Which of the following contributes to the desertification of the land?
A. under-populated land
B. overgrazing of farm animals
C. sufficient irrigation
D. failure to cultivate the land
Respuesta:
B. pastoreo excesivo de animales de granja
Porque son lugares secos.
Explicación:
Las políticas e infraestructuras que promueven la agricultura en las tierras de pastoreo que no pueden mantener sistemas viables de cultivo, contribuyen a la desertificación. La mayoría de las áreas de tierras secas (el 65%) son tierras de pastoreo que son más adecuadas para el pastoreo sostenible que para el cultivo.
HELP!!
Which features of alveoli enable them to exchange gases efficiently? (Select all that apply.)
A. thin walls
B. surrounded by blood vessels
C. small numbers of them in each lung
D. large surface area
Do not scam me using links or attachments (except photos of the answer) or answer this by saying a simple yes or no because that also scams me.
Answer:
the answer is a i hope this helps
Explanation:
The sac-like structure of the alveoli increases their surface area. In addition, the alveoli are made of thin-walled parenchymal cells. These features allow gases to easily diffuse across the cells. so the
Alveoli has thin walls which are surrounded by blood vessels, and they have maximized are for gas exchange. Thus, option A, B, and D are correct.
What are Alveoli?These are basic respiratory units, which are balloon like structure present in the lungs, where exchange of gases takes place. A pair of human lungs can contain approximately 480 million alveoli, which produces about, 50 to 75 square meters surface are.
Alveoli are made of thin walls, and they are covered by a rich blood supply through capillaries, this supplies a diffusion gradient for oxygen to move into the blood and carbon dioxide to move into the lungs.
Therefore, the larger surface area, presence of thin wall, which is only one cell thick, and rich blood supply due to presence of blood vessels enable them to exchange gases efficiently.
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Glucose, Starch, and cellulose are this type of molecule that is produced by plants *
A.lipids
B.proteins
C.carbohydrates
PLS HELP
C. Carbohydrates
Hope you find this helpful
Pretend your classmate has told you that they are having trouble with what succession is. How would you explain to them what succession is? How would you explain the difference between primary and secondary succession? Write your response in the textbox and submit when you are done. DO NOT GO.O/.GLE YOUR ANSWER
Answer:
Ecological succession is the process of change in the species structure of an ecological community over time. The time scale can be decades (for example, after a wildfire) or more or less.
Explanation:
Ecological succession is basically how the structure of an ecological community changes.
]How does emphasis on agricultural technology today compare to the recent past?
Today scientists are only concerned with the nutrition of livestock, not with size or quantity.
In the past, scientists were concerned with mass-producing for local areas, not for large areas.
In the past, scientists have not been concerned with the well-being of livestock or crops.
Today scientists are devising ways to use advancements in positive ways for the environment.
Answer:
In the past, scientists were concerned with mass-producing for local areas, not for large areas.
Explanation:
Today agriculture is made on a more global scale
Can SOmeone do this for meh... I just got back home and im tired ;L
Firmly hold with one hand the end of a ruler (or similar object) over the edge of a table. Pull the other end down gently and listen to the sound. Then give the ruler (or similar object) a harder downward pull, and see if there is a difference in sound. Describe what you hear and explain the difference using the terms “energy,” “amplitude,” “intensity,” and “decibel.”
2. Take some time to listen to sounds in your environment. Make a list of ten sounds, ranking them from the highest pitch to the lowest. Write a couple of sentences describing whether this was easy or difficult and why. (Some of the sounds can come from tapping objects that vibrate or playing musical notes on an instrument.)
A protein may fold incorrectly if_________ brings the wrong amino acid to the ribosome to assemble the protein.
If tRNA does not bring back the appropriate amino acids, the protein may fold incorrectly. so, the blank is tRNA.
What is tRNA?The type of RNA that helps in the synthesis of proteins from mRNA, called as tRNA. tRNA acts as an adapter molecule during the translation process, and as an adapter, it connects amino acids to nucleic acids. It carries the amino acids that are added to the peptide chain and decodes the same codons in the mRNA molecule.
The structure of tRNA can be separated into primary, secondary and tertiary structures. The structure tRNA has four arms (the acceptor, D, anti-codon and -arms), three loops (D, anti-codon and -loop) and a variable region.
It binds amino acids to specific codons present in the mRNA, by acting as an adapter. Therefore, If tRNA bring wrong amino acid to ribosome for assembly of protein, protein may fold incorrectly.
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How can the energy stored in the photosynthetic organism be used?
☁️ Answer ☁️
1: "Through photosynthesis, certain organisms convert solar energy (sunlight) into chemical energy, which is then used to build carbohydrate molecules."
2: "The energy stored in the bonds to hold these molecules together is released when an organism breaks down food. Cells then use this energy to perform work, such as movement. "
-GoogIe
(And I love your pfp)
Hope it helps.
Have a nice day noona/hyung.
TRUE/FALSE: One way to tell the difference between a plant and animal cell is that the animal cell is rectangular in shape.
Answer:
false
Explanation:
animal cells are circular
Limiting factors are divided into two categories. What are they? Give an example of each.Limiting factors are divided into two categories. What are they? Give an example of each.
Answer:
Limiting factors fall into two broad categories: density-dependent factors and density-independent factors. These names mean just what they say: Density-independent factors have an impact on the population, whether the population is large or small, growing or shrinking.
the density-dependent factor example is:
Density-dependent factor, also called regulating factor, in ecology, any force that affects the size of a population of living things in response to the density of the population (the number of individuals per unit area).
the independent factors example is:
Pollution. Like other density independent factors, pollution is a good example of a density independence.
Explanation:
pls mark brainliest
Which of the following cellular processes will be involved in the growth, development, and reproduction of the offspring?
a. meiosis only
b. mitosis only
C. both meiosis and mitosis
d. neither meiosis nor mitosis
Answer:Both Mitosis and meiosis
Explanation:
Cell face both conditions for the development of new offspring
Yeast are unicellular organisms that produce offspring from a bulge that forms and breaks away from the parent. Based on this information, what type of reproduction is this?
A. Sexual Reproduction
B. Asexual Reproduction (budding)
C. Asexual Reproduction (binary fission)
Answer: B. asexual reproduction (budding)
Explanation:
it might help you
Space hurricanes are caused by____________.
Question 2 options:
streams of plasma unleashed from the sun in what's known as the solar wind.
the warm waters of the ocean fuel space hurricanes.
electrons and protons combining together to form a massive tornado like feature in the sky.
the planet Pluto, who is still mad about being kicked out of our solar system.
Space hurricanes are caused by streams of plasma unleashed from the sun in what's known as the solar wind.
What is Space hurricane?
This is a phenomenon in which charged electrons and plasma make up a storm instead of rain and wind.
The plasma is usually unleashed from the Sun which is why option A was chosen as the most appropriate choice.
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Which behavior is a response to an external stimulus? EXPLAIN WHY
A. An elephant drinks water to quench its thirst.
B. A dog vomits during an illness to rid itself of pathogens.
C. A child gets a fever to fight off the flu.
D. A turtle suns itself on a rock during a cool day.
Answer:
D
Explanation:
External means outside of, internal is within. The question is asking for external stimulus. Answers A-C are internal: thirst, fever and illness.
Which statement best describes how panting after running helps a person's body maintain homeostasis? EXPLAIN THE ANSWER
A). It keeps the person's body warm when it is cold outside.
B). It rids the body of harmful organisms in the respiratory tract.
C). It brings more oxygen into the body to help meet increased energy needs.
D). It signals the body to start exercising to prevent getting out of shape.
PLS HELp
Flocabulary
Please help mee lol!!!! (ill mArk BrAiNlIeSt)
Due in 10 mins
Answer:
1. Dendrites
2. Nucleus
3. Soma
4. Axon
5. Myelin Sheath
6. Axon Terminal Button
Explanation:
Answer:
1. Dendrite
2. Nucleus
3. Cell body
4. Schwann cell
5. Myelin sheath
6. Axon terminal
Explanation:
1. What is the value of the AMPLITUDE for WAVE A?
2. What is the value of the WAVELENGTH for WAVE A?
Answer:
Sorry I really just needed the points ;(
Explanation:
Answer:
1) Amplitude of wave A: 0.5 meters
2) You would have to find the wavelength with the equation λ = [tex]\frac{v}{f}[/tex]
Explanation:
1) Amplitude of a wave is the height of the wave from the horizontal line drawn on "0" to the highest point on the wave.
2) λ is lambda, sign for the wavelength. V is the velocity of the wave, and F is the frequency of the wave.
Hope this helps!
Can octopuses grow their fangs back?
Answer:
hi
Explanation:
i think they can't.But they can regrow their arms
have a nice day
Which fact supports the following conclusion?
Agricultural sciences have a global impact.
Grains are in higher demand than livestock worldwide.
The demand for American meat products is increasing.
Genetic modification contributes to health internationally.
The world’s population has risen to seven billion people.
The arrows in the picture below show several ways heat is transferred from the Sun as it strikes sand on the surface of a beach. Which arrow shows convection?
A.
1
B.
2
C.
3
D.
4
Arrow 4 show convection. Thus option 4 is correct.
What is convection ?
The process in which transfer of heat occurs by movement of a heated fluid either air or water called as convection.
Initially the heat transfer through conduction, however a bulk heat transfer takes place due to the motion of the fluid.
The mechanism of convection involved, fluid is heated from below, leads to thermal expansion.
So that the lower layers, which are hotter now, become less dense.
So the less denser layer replaced by colder layer due to buoyancy nd colder layer is more dense.
This process continuously occur and heat transfer occur through convection
It occurs in both liquid and gases, may be natural or forced, bulk transfer occur.
Thus option 4 is correct.
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PLS HELP
Flocabulary
Answer:
im pretty sure its B
Explanation:
Reflection Questions
1. Explain how biological evolution is supported by the fossil record.
2. Why is natural selection a mechanism for biological change?
3. How does chemical evolution explain the origin of life on Earth?
4. Explain why scientific theories, such as biological and chemical evolution, represent the
strongest explanation of the changes observed in the fossil record.
5. How can scientific theories on evolution and the fossil record change over time?
Answer:
1) The word ‘evolution’ was first mentioned in the book ‘The Origin of Species’ in 1859, by Charles Darwin. Darwin put forward the concept of evolution during his journey to the Galapagos Islands.
2)Natural selection is an important mechanism of evolution. It states that the organisms that are able to survive and reproduce with the changing environmental conditions are selected by nature while the ones that cannot survive are eliminated.
3) Evolution mainly deals with the origin of life on earth. The conditions and the forms of life on earth were entirely different from what we see today.
please forgive me I cant answer 4th one..
5)Charles Darwin, an English naturalist of the 19th century made an extensive study of nature for over 20 years.
1. The fossil record provides crucial evidence for biological evolution. Fossils are the preserved remains or traces of past organisms, providing a record of life on Earth over millions of years.
By studying fossils, scientists can observe changes in organisms and their characteristics over time. Fossils show a progression of simpler life forms in older layers to more complex ones in more recent layers.
2. Natural selection is a mechanism for biological change because it leads to the adaptation of populations to their environments over time. It is based on the concept that individuals within a population exhibit variation in traits, and those traits that enhance survival and reproduction are more likely to be passed on to future generations.
Through natural selection, individuals with advantageous traits have higher chances of surviving and reproducing, leading to the increased frequency of those traits in subsequent generations.
3. Chemical evolution, also known as abiogenesis or prebiotic evolution, explains the origin of life on Earth by proposing that life arose from non-living matter through a series of chemical reactions.
According to this theory, in Earth's early conditions, simple organic molecules formed from inorganic compounds through processes like lightning, volcanic activity, and reactions in the atmosphere and oceans.
These molecules then underwent further reactions, leading to the formation of more complex molecules like amino acids and nucleotides, which are the building blocks of proteins and nucleic acids, respectively.
4. Scientific theories such as biological and chemical evolution represent the strongest explanations for the changes observed in the fossil record because they are supported by extensive evidence from multiple scientific disciplines.
These theories have withstood rigorous testing, scrutiny, and peer review over many years. They are based on a large body of evidence, including the fossil record, comparative anatomy, genetics, molecular biology, and observations of natural populations.
5. Scientific theories on evolution and the fossil record can change over time as new evidence is discovered, technologies advance, and scientific understanding improves.
The process of scientific inquiry involves continuous investigation, testing, and refinement of theories based on new data and observations.
As scientists gather more evidence from fossil discoveries, genetic studies, experimental research, and other fields, our understanding of evolution and the fossil record can deepen and evolve.
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What are winds that blow in a certain direction most of the time and can produce surface currents called?
the Coriolis effect
surface winds
prevailing winds
ocean winds
Answer: surface winds
Dominic made the table below to organize his notes about mixtures. A 1-column table. The first column labeled properties of mixtures has entries has no set composition, must have more than one state of matter, must have more than one substance. What mistake did Dominic make? A. The title should read “Properties of Solutions” because some mixtures do not have all of the properties listed. B. There is a definite recipe to make each mixture, so the composition of a mixture is set. C. Although it is possible to have more than one state, it is also possible to have only one state. D. A single substance can be used to make a mixture if the substance is composed of more than one element.
Although it is possible to have more than one state, it is also possible to have only one state.Explanation:
Klaus is going to Greece to study the ancient columns. He typically studies artifacts in a lab, but the columns are immobile and can't be taken to
a lab. What kind of artifacts are the columns considered to be?
A .archaeological features
B.stationary artifacts
с.cumulative lifeways
D.stationary remains
Make a Punnett Square for two smooth seed hybrid pea plants (Ss).
Answer:
Hope this helps!
TRUE/FALSE: When only water molecules diffuse through a cell's membrane, the process is referred to as hydrolysis.
Answer:
False
Explanation:
The correct answer is osmosis
Answer:
false
Explanation:
Why should God’s Natural Moral Law be the foundation for all other laws? (i can't fnd religion so i just put it in biology)
help please i have to do it now!!!!
Answer:
Explanation:
1,3,4 hope this helps<3