Metal alloys, such as iron, copper, and zinc, essential for industrializing any society. As a result, regions of the world that are currently making the transition from developing to industrialized civilizations have a quickly increasing need for raw minerals.
What are the important properties of minerals?Nutrients called essential minerals are required to keep the body healthy. There are 13 different significant minerals in total. These are necessary for development, mobility, the creation of energy, and other metabolic processes.
Therefore, Crystal shape, color, hardness, cleavage, and specific gravity are among the most prevalent physical characteristics. Examining the crystal form of a mineral is one of the finest ways to identify it (external shape).
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Emphysema is COPD that may lead to which of the following? Check all that apply. O Alveolar wall breakdown O Reduced respiratory membrane surface area and gas exchange O Increased vital capacity O Hypoxemia, hypercapnia, and respiratory acidosis O Polycythemia Cor pulmonale
Emphysema is a severe form of COPD that can lead to several serious complications, such as alveolar wall breakdown, reduced respiratory membrane surface area and gas exchange, increased vital capacity, hypoxemia, hypercapnia, and respiratory acidosis, and polycythemia Cor pulmonale.
Emphysema is a chronic obstructive pulmonary disease (COPD) that is characterized by the destruction of the alveolar walls and a reduction in the surface area available for gas exchange.
As a result, individuals with emphysema may experience a decrease in vital capacity, which is the amount of air that can be expelled from the lungs after a deep inhalation.One of the most common complications of emphysema is hypoxemia, which is a condition in which the body does not receive enough oxygen.
This can lead to hypercapnia, a condition in which there is too much carbon dioxide in the blood, and respiratory acidosis, a condition in which the blood becomes too acidic. Another complication of emphysema is polycythemia, which is an increase in the number of red blood cells. This can occur as the body tries to compensate for the lack of oxygen by producing more red blood cells to carry oxygen to the body's tissues.
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What are the 5 chromosome mutations?
The 5 chromosome mutations are given as , duplication, deletions, insertions , inversions, translocation.
1. Duplication: The multiple copies of a chromosome that occur during the duplication process.
2. Deletions - When a nucleotide is removed, the mRNA codons change (the nitrogen bases of a DNA). This will change the makeup of amino acids.
3. Insertions – An insertion is the addition of a new nucleotide.
4. Chromosomal inversions happen when a chromosome fragment breaks off and reattaches in the opposite direction to the same spot.
5. Translocation: This is the splitting in half and moving of two chromosomes.
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Net redistribution of extracellular fluid by bulk flow from the plasma compartment into the interstitial fluid compartment is referred to as
Filtration is the term used to describe the net redistribution of extracellular fluid by bulk flow from the plasma compartment into the interstitial fluid compartment.
The process of forcing fluid and dissolved chemicals past capillary walls and into the interstitial fluid is known as filtering. The hydrostatic pressure gradient also referred to as the hydrostatic pressure difference between the plasma compartment and the interstitial fluid compartment, is what propels this process.
The filtration process is essential for maintaining the balance of fluids and electrolytes in the body and for the removal of waste products.
Filtration is one of the three basic mechanisms that contribute to the movement of fluid and dissolved substances across the capillaries. The other two mechanisms are diffusion and osmosis.
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According to the primitive earth model which one of the following compounds was not present in the beginning.
A.NH3
B.H2S
C.CO2
D.O2
The Correct answer is Option D.Oxygen
According to Oparin, oxygen was not present in the primitive atmosphere of the Earth.
What is Oxygen?The chemical element with the atomic number 8 and symbol O is called oxygen. It belongs to the periodic table's chalcogen group, is a very reactive nonmetal, and an oxidising agent that easily produces oxides with most elements as well as other compounds. After hydrogen and helium, oxygen is the third most plentiful element in the universe and the most abundant element on Earth. Two atoms of the element combine to generate dioxygen, an odourless and colourless diatomic gas with the formula O 2 at standard pressure and temperature.
According to researchers at MIT, the Great Oxygenation Event (GOE), which is thought to have started as early as 2.33 billion years ago, was the beginning of oxygen's ongoing presence in the atmosphere.
Oxygen in Primitive EarthLouis Pasteur wrote about his research in 1864, demonstrating that microbial life could not have developed spontaneously in the absence of preceding life. This work is regarded as a milestone in modern science as it resolved a long-running debate regarding spontaneous generation.
The concept of spontaneous genesis holds that live things could appear miraculously from inanimate matter.
But Pasteur's findings presented evolutionary biologists with a fresh conundrum: if life could only develop from life, how did living things first originate on the planet?
The solution was presented in the 1920s by A.I. Oparin of Russia and J.B.S. Haldane of England, who independently made compelling cases that the origin of life could be explained by a lengthy and gradual process of chemical evolution rather than by the rapid spontaneous generation of complete organisms in a matter of weeks.
Elements primitive earthAn atmosphere developed when Earth cooled, primarily from gases released by volcanoes. It contained methane, hydrogen sulphide, and ten to 200 times as much carbon dioxide as the atmosphere we are surrounded by today. The Earth's surface began to cool and solidify after roughly 500 million years, allowing water to accumulate there.
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Carbon is considered a building block of life and is very useful as a chemical because it is able to make very complicated compounds. This is because it is able to bond with up to __ other molecules.
a. one
b. two
c. three
d. four
Answer:
d. four
Explanation:
Carbon can form maximum of four bonds to other atoms due to its electronic configuration and valence electron counts).
A high school football player has received a hard direct blow to the abdomen. Which of the following may indicate internal bleeding?
1. Profuse bleeding from the bowels, deep slow breathing, slow pulse
2. Weak rapid pulse, tenderness, guarding, or pain in the abdomen
3. Deep slow breathing, normal pulse, warm dry skin
4. Warm dry skin, rapid pulse, nausea, deep regular breathing
When a high school football player has received a hard direct blow to the abdomen, the thing which indicates internal bleeding is weak rapid pulse, tenderness, guarding or pain in the abdomen.
Thus, the correct answer is 2.
Internаl аbdominаl injuries from blunt trаumа аre serious injuries thаt occur when the body hits or collides with а lаrge object. These types of injuries аre most common in contаct sports like footbаll, ice hockey, soccer, аnd lаcrosse. The most common Internаl аbdominаl injuries include kidney injury, spleen injury, liver injury, аnd аbdominаl injury. Аbdominаl injury cаn result in injury to the pаncreаs, diаphrаgm, stomаch, gаllblаdder, blаdder, or intestines.
Аn internаl аbdominаl injury cаn cаuse rаpid blood loss. Eаrly indicаtions of аbdominаl trаumа include nаuseа, vomiting, blood in the urine, аnd fever. The injury mаy present with аbdominаl pаin, tenderness, distension, or rigidity to the touch, аnd bowel sounds mаy be diminished or аbsent.
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When an individual starts exercising at a light pace, what energy system provides the bulk of energetic needs if this were to last an hour
The fatty acids provide the bulk of energetic needs for light exercise if it were to last for an hour.
Fatty acids are chemically the carboxylic acids having a long aliphatic chain that may be saturated or unsaturated. These are responsible for the deposition of fats in the body. Fatty acids are responsible for the formation of lipids in the body. The various food forms that provide fatty acid to the body are: seafood, nuts. seeds, plant oils, etc.
Exercise is the form of body movements performed in order to keep the body healthy and active. There are various forms of exercise from the mild walking to high intensity workouts.
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what is the relationship of chemoreceptors, carbon dioxide, PH and ventilation rate?
The relationship between chemoreceptors, carbon dioxide, pH and ventilation rate is that the chemoreceptors detect changes in the levels of carbon dioxide and pH in the blood, and signal the brain to adjust the rate of ventilation accordingly to maintain the normal range of carbon dioxide and pH in the body.
What are chemoreceptors?Chemoreceptors are specialized sensory cells that detect changes in the levels of certain chemicals, such as carbon dioxide and pH, in the blood. These receptors are found in the carotid bodies and aortic bodies, which are located near the carotid artery and the aorta, respectively.
Chemoreceptors in the carotid and aortic bodies are sensitive to changes in the levels of carbon dioxide and pH, and they signal the brain to increase or decrease the rate of ventilation accordingly
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Which of the following is the best example of a mechanistic understanding of a function?
a. We are self-aware so that we can recognize ourselves and distinguish ourselves from others.
b. The kidneys produce urine so that waste products, such as uric acid, do not build up in the blood.
c. Skeletal muscle cells contract when myosin heads attach to actin filaments and rotate, producing force.
d. Bones are strong so that they can support our body weight and protect delicate organs.
Myosin heads bind to actin and myosin and spin to produce force in the contraction of skeletal muscle cells. an illustration of how a function is understood mechanistically.
And what were the four skeleton types?The body's framework is the skeleton. It helps give us form and serves as the base for other structures to attach to. The 206 bones that make up the skeleton may be divided into four groups: flat, long, short, and irregular.
What makes bone health important?Bones are used by the body for a variety of functions, including as anchoring muscles, protecting organs, and creating structure. While it's important for children and adolescents to have strong, stable bones, there are things adults can do to preserve bone health.
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A genetic mutations involving a single base causes an error that affects the sequence of the next 500 amino acids in a protein. Which type of mutation could have produced this type of error in the protein
The correct answer is C; Frame-shift, Because protein-encoding DNA is split into three-base codons, insertions and deletions can change a gene's message to the point where it no longer makes sense. These modifications are known as reading frame offsets.
For example, consider the phrase: "The fat cat sat". Each letter denotes a codon. If we remove the initial letter and evaluate the statement in the same way, it makes no sense.
A similar mistake happens at the molecular level in frame-shift, leading the codons to be processed erroneously. This frequently results in the production of worthless proteins.
An insertion or deletion involving a number of base pairs that is not a multiple of three that disrupts the triplet reading frame of a DNA sequence.
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Full Question ;
A genetic mutation involving a single base causes an error that affects the sequence of the next 500 amino acids in a protein. Which type of mutation could have produced this type of error in the protein?
A)Silent
B)Nonsensse
C)frame-shift
Propose an explanation for how a single amino acid substitution could cause such a dramatic difference in the final shape of red blood cells
A single amino acid substitution in a protein can cause a dramatic difference in the final shape of red blood cells through changes in the protein's conformation.
Proteins are composed of a sequence of amino acids and their three-dimensional structure is determined by the interactions between different regions of the protein, such as the hydrogen bonds, electrostatic interactions, and hydrophobic interactions. These interactions help to keep the protein in its specific conformation, which is essential for its function. A single amino acid substitution can alter these interactions and disrupt the protein's conformation. This can lead to changes in the shape and properties of the protein.
In the case of red blood cells, a single amino acid substitution in a protein that is responsible for maintaining the shape of the cell can cause the cell to change shape. For example, a substitution in the protein spectrin, which is a component of the cell membrane, could cause the membrane to be more or less flexible and thus resulting in a change in shape of the red blood cell. This change in shape can affect the mechanical properties of the cell and can have a significant impact on its ability to flow through capillaries and deliver oxygen to tissues.
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How do we know a particular lineage of prokaryote exists in a natural habitat without first isolating and growing it in laboratory culture
The use of DNA-based techniques is one way to ascertain whether a certain lineage of prokaryote occurs in a natural habitat without first isolating and cultivating it in laboratory culture.
These methods allow researchers to identify species of prokaryotes without having to isolate and grow them in culture. The most common DNA-based method is called PCR (polymerase chain reaction) which is used to amplify and detect the presence of specific DNA sequences in a sample. By designing primers specific to a particular prokaryote, researchers can determine if the organism is present in a given sample, even if it is present in very small amounts.
Other methods such as denaturing gradient gel electrophoresis (DGGE) and 16s rRNA gene sequencing can also be used to identify different species of prokaryotes in a sample. These methods allow researchers to determine if a particular lineage of prokaryote exists in a natural habitat without having to isolate and grow it in laboratory culture.
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What are two variations of fur color in cats?
There are two basic colors of cats, black and red. These are called “dominant” colors. The color of all cats relates to these two colors in some way, by changing the color or covering it up. There is also a “dilute” of each color.
Generally, the colours, which can be termed differently depending on the breed, are: white, red, blue, black, cream, cinnamon, fawn and brown. The colour of a cat depends completely on genetics. The two primary colours in cats are black and red. There are six varieties of cat fur patterns. These are Tabby, Solid, Bicolor, Tricolor, Tortoiseshell, and Colorpoint.
A cat displaying a dominant color (black, red, tortie, etc.) must have a parent which displays a dominant color. Two recessive color parents (cream, blue, etc.) cannot produce an offspring of a dominant color (black, red, etc.).
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In the United States, where can volcanoes like those at B be found?
Mark this and return
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Volcanoes are produced when magma rises on top of plate B. Due to the tremendous temperature in the mantle, the leading edge of plate A moved toward the mantle as it subducted beneath plate B and melted.
A volcano mountain is created when magma from the earth's upper mantle surfaces and erupts. the lava flow that is created as magma rises to the surface and deposits ash. A fresh layer of lava is deposited to the surface as the volcano continues to erupt, building up to form a mountain. Divergent, convergent, and transformal plate borders are where the majority of seismic activity takes place.
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What causes populations to lose genetic diversity due to chance?
Stochastic sampling error (i.e., genetic drift) causes populations to lose genetic diversity due to chance.
Genetic drift is a result of sampling error because individuals are randomly chosen when a population is sampled. A random selection is one in which each member of the population has an equal chance of being chosen.
The random change in allele frequencies caused by stochastic sampling of alleles from the previous generation is known as genetic drift (independent of demographic stochasticity).
The variety of various inherited features within a species is referred to as genetic diversity. There would be many people with a wide range of diverse traits in a species with significant genetic diversity. For a population to adapt to changing surroundings, genetic variety is essential.
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How does the Devil and Tom Walker reflect Puritans
"The Devil and Tom Walker" reflects the Puritan belief in the concept of predestination, which holds that God has already predetermined the fate of every individual and that salvation can only be attained by the elect, who have been chosen by God.
Tom's encounter with the devil can be seen as a reflection of the Puritan belief in the eternal struggle between good and evil, and the constant temptation of sin.
What does "The Devil and Tom Walker" show?"The Devil and Tom Walker" is a short story by Washington Irving that was published in 1824. The story also reflects the Puritan belief in the importance of hard work and the dangers of material wealth.
The story portrays Tom Walker as a greedy and miserly man who is only interested in accumulating wealth and power, and is ultimately punished by the devil for his greed and avarice. This reflects the Puritan belief that material wealth is a temptation that can lead one away from the path of salvation.
Therefore, "The Devil and Tom Walker" reflects many of the Puritan beliefs and values that were prevalent in New England during the late 1700s, including the concepts of predestination, the eternal struggle between good and evil, the dangers of material wealth, the importance of repentance and redemption.
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how do structures in living organisms compared with structures of non-living things such as construction cranes
Living things have the capacity to grow, procreate, and carry out metabolic processes. Biomolecules, the building blocks of living things, need energy to function.
They display the processes of breathing, digesting, movement, and excretion. These things are made of cells.
Ships, houses, and airplanes are examples of non-living things that do not develop or procreate. These substances are made of inorganic molecules and lack any vital metabolic processes for life. Non-living things do not contain any cells.
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The process of comparing currently experienced visual input with past visual
memories takes place in
9
a) the corpus callosum.
b) the thalamus.
c) the cerebellum.
d) association areas.
The process of comparing currently experienced visual input with past visual memories takes place in association areas.
The part of the cerebral cortex that processes visual information is called the visual cortex. The occipital lobe is where it is situated. The visual cortex receives sensory information coming from the eyes after passing through the lateral geniculate nucleus of the thalamus. The primary visual cortex, also known as visual area 1 (V1), Brodmann area 17, or the striate cortex, is the region of the visual cortex that receives sensory information from the lateral geniculate nucleus. The visual areas 2, 3, 4, and 5 (also known as V2, V3, V4, and V5 or Brodmann area 18 and all of Brodmann area 19) make up the extrastriate regions.
A visual cortex exists in the left hemisphere of the brain as well as the right.
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What can be known about Mendel's?
Mendel's five-part hypothesis includes his inheritance laws, and is based on research into genetics and how chromosomes are passed on from generation to generation. The laws of heredity dictate that a gene consists of two alleles of his.
Gregor Mendel discovered the basic laws of heredity through the study of peas. He concluded that genes come in pairs and are inherited as separate entities, one from each parent. Mendel traced the segregation of parental genes and their appearance in offspring as dominant or recessive traits.
Mendel's five-part hypothesis is an answer to a scientific question and is largely based on his research. It identifies his three alleles for each gene, which is the answer to scientific questions and is based on published genetics.
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Which of the following best explains the differences in flower color of the African violets in the greenhouse
'An enzyme responsible for flower color does not fold correctly in cooler temperatures, and the greenhouse is warmest in the center' best explains the differences in flower color of the African violets in the greenhouse
Much like human skin color, violets' color is driven by proteins, especially in the case of violets, by enzymes. Enzymes (generally like proteins) need to function at a specific temperature. Outside this temperature, the enzyme cannot reach its correct form and eventually its function in vivo changes.
Regarding the above question, the plants were in a greenhouse that changed the natural temperature of the environment, so the violets' color change was due to the enzymes involved in flower color shrinking appropriately at low temperatures and the greenhouse being warm in the middle.
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Complete question :
An African violet grower observes that genetically identical African violet plants growing near the walls of the greenhouse have white flowers, that plants growing farther away from the walls have pale blue flowers, and that plants growing nearest the center of the greenhouse have dark blue flowers.
Which of the following best explains the differences in flower color of the African violets in the greenhouse?
A Warmer temperatures result in genotypic alterations, which result in flower color differences.
B The plants along the walls of the greenhouse are homozygous recessive and therefore have white flowers.
C An enzyme responsible for flower color does not fold correctly in cooler temperatures, and the greenhouse is warmest in the center.
D More light is available along the walls of the greenhouse, so the flowers need less pigment to absorb sunlight for photosynthesis.
In E. coli the tryptophan operon is controlled by attenuation. The beginning of the Trp mRNA has several codons for Trp in a row. When Trp amino acid is limiting, the mRNA ________?
a. is destroyed and the operon is not transcribed
b. basepairs to itself, allows RNA polymerase to continue transcribing the operon
c. basepairs to itself, blocking RNA polymerase from transcribing
d. attaches to the promotor sequence to activate RNA polymerase
When Trp amino acid is limiting, the mRNA basepairs to itself, blocking the RNA polymerase from transcribing the operon. So option c is correct.
Attenuation works by causing the mRNA to form a stem-loop structure that is recognized by the RNA polymerase. When the mRNA contains this loop, the RNA polymerase is blocked from transcribing the operon. This blocking mechanism turns off the production of proteins related to tryptophan, such as enzymes for its synthesis and transport, when tryptophan is in short supply.
The loop structure also prevents the mRNA from attaching to the promoter sequence, which normally activates the RNA polymerase. In other words, when tryptophan is limiting, the mRNA does not attach to the promotor sequence and the operon is not transcribed. The result is that the transcription of the tryptophan operon is inhibited when the cell senses that tryptophan is in short supply.
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How are weather and climate the same? How are they different? ¿En qué se parecen el tiempo y el clima? ¿En qué se diferencian?
Answer:
They are the same because they both talk about atmospheric conditions like precipitation, temperature, amount of sun, etc. They are different because weather talks about short-term changes in the atmosphere while climate describes weather over a long period of time in a certain area. Different regions can have different climates and or weathers.
Please help!
Students in Ms. Brown's class are making observations in the garden outside of the school. They make a list of all the abiotic and biotic factors in their notebook. Part of the list is below:
Gravel
Grass
Butterfly
Sunflower
Bird feeder
Flowerpots
Which items on the list are a part of the garden ecosystem?
A- Gravel, bird feeder, flowerpots
B- All the listed items are part of the ecosystem
C- None of the listed items are a part of the ecosystem
D- Grass, butterfly, sunflower
Answer:
It is D- grass, butterfly, sunflowers
The items throughout the list like grass, butterflies, and sunflowers are a component of the gardening ecosystem.
What exactly is an ecosystem?An ecosystems is an area where vegetation, animals, and certain other organisms interact with the surrounding environment, weather, and other variables to form a bubble of life. In ecosystems, biotic and abiotic factors—or nonliving ingredients. Biotic variables include plants, animals, and other types of species.
Why are ecosystems so important?Ecological systems keep our soil healthy, purify our air, regulate our temperatures, recycle elements, and provide us with food. They provide tools and raw ingredients for producing medicines and many other goods. They form the foundation of civilization and sustain our economies.
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Which of the following explanations best describes how mass is
conserved in the process above?
A.Matter is consumed and used by individual cells to grow
following mitosis
B.Matter is consumed and used by individual cells to grow
following meiosis
C.Matter is created by individual cells to grow following mitosis
D.Matter is created by individual cells to grow following meiosis
Following mitosis, each individual cell uses matter to grow. Individual cells produce matter to expand after mitosis.
How does photosynthesis maintain mass?Six carbon atoms, twelve hydrogen atoms, and eighteen oxygen atoms are reorganized in this process from one configuration in the reactants to another configuration in the products using the energy of the sun. Because the same atoms are present on both sides of the reaction, mass is conserved.
What does photosynthesis's mass mean?A tree's main component by weight is carbon. Carbon is derived from carbon dioxide, which is used in photosynthesis. Plants use photosynthesis to transform solar energy into chemical energy, which is stored in the bonds of carbon molecules made of water and carbon dioxide from the atmosphere.
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Which genetically engineered medicine is injected into the body to protect a person from the effects of a virus
The flu vaccine is a type of vaccine that protects the body against the flu. It develops antibodies after two weeks of vaccination. These antibodies provide protection against influenza viruses.
The flu vaccine reduces the risk of flu illnesses, hospitalization, and flu-related death. It only protects the body against influenza, not any other illnesses.
The pancreas uses its multiple hormones, primarily glucagon and insulin, to keep blood glucose levels within a very narrow range of 4-6 mM. This is accomplished by the opposing and balanced actions of glucagon and insulin, a process known as glucose homeostasis.
Insulin and glucagon are hormones that assist manage your body's blood glucose — sometimes known as sugar — levels. Glucose is produced from food and flows in your bloodstream to promote digestion.
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PBS Evolution: Great Transformations
1. If the world’s history were compressed into one hour, how long have humans been here?
Microbes. Single-celled organisms
2. How long ago did mammals first appear on earth?
Mammals first appeared about 200 million years ago
3. What type of animal did the skull that Dr. Gingrich discovered resemble?
Dr. Gingrich discovered resembled a whale
4. What did "Whale Valley" used to be?
Whale valley is a
5. What unusual feature did they find at the end of the early tetrapods’ limbs?
6. How long ago did animals first appear on Earth?
7. When the mouse "eyeless" gene was implanted into the fruit flies, what happened?
8. How would walking on two legs be an advantage?
9. What modifications does the human skeleton have?
Humans has the same transformation as other animals even though humans are special.
10. Summary/reflection:
Given that whales and other mammals resembled other mammals in terms of their skulls and other sculptures, based on the fossil evidence, humans have undergone evolutionary transitions.
The transition from land animals to whales is one of the most well-known instances of a supposed change cited by the evolution contingency in the opening of the program. The fossils of Pakicetus, Ambulocetus, Rhodocetus, Dorontid, and Basilosaurus show that this transition can be explained. Pakicetus only has a small portion of its cranium to display, as opposed to a whole transitional fossil.
The program portrays Ambulocetus as a fully preserved fossil of an aquatic mammal with legs, yet this is a stretch of the fact because the animal's skeleton was actually discovered to be extremely fragmented. Rhodocetus is solely represented in the series by a skull.
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What are geohazard and how can they affect our live and our property? Decribe the data that are available for u to predict and locate variou geohazard
Geohazards refer to natural phenomena that have the potential to cause damage to people, property, and infrastructures.
Geohazards or geological hazards may include landslides, earthquakes, volcanic eruptions, floods, and coastal erosion, among others that can have significant impacts and damages on communities, including loss of life, injury, and damage to homes, buildings, and infrastructures.
To predict and locate various geohazards, scientists and researchers use a variety of data sources, including geological mapping, satellite imagery, ground-based monitoring, and historical records. For example, geological mapping can provide information on the types of rock and soil present in an area, which can help identify areas that are more prone to landslides or earthquakes.
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Each gene ___ for a different_____
Answer:
I think its each gene pair for a different sex cell
Explanation:
i'm not 100% on this, if its wrong im very sorry
What is an example of a behavioral adaptation in animals?
Explanation:
Behavioral adaptation is something an animal does usually in response to some sort of external stimulus in order to survive. Hibernating during winter is an example of a behavioral adaptation,this is common among bears.
Humans are classified into what group of mammals because their developing embryo grows within the mother before a live birth?
Humans belong to the group of mammals known as placental mammals, because the developing embryo grows within the mother before a live birth.
Placental mammals are any of a group of mammals in which the embryo and later the fetus, is nourished in the uterus by an organ called the placenta. The placenta is an organ that attaches the embryo to the uterine wall and is the site of exchange between the mother’s and the fetus’s blood in order to provide nourishment to the developing fetus.
Placental mammals are the most highly evolved group of mammals and include monkeys, apes, and humans. In contrast to other mammals, such as marsupials whose embryos are nourished in the uterus for a short time before being born, placental mammals develop within the mother until they are fully developed. This prolonged period of development in the mother gives the fetus time to fully develop its organs and to grow to a larger size before birth.
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