Answer:
B. different genes may be expressed
Explanation:
If you're chronically stressed and your body is constantly flooded with cortisol, you will get sick easier because your white blood cell count will drop, your likelihood of developing tumors will increase and you'll also become more vulnerable to infection and tissue damage.
Answer:
B. different genes may be expressed
Explanation:
If we have a stressful job or an unhealthy diet, different genes may be expressed on our cells.
Explain how this mutation will result in competition within the population that is linked to the idea of survival of the fittest.
Answer:
Survival of the fittest, term made famous in the fifth edition (published in 1869) of On the Origin of Species by British naturalist Charles Darwin, which suggested that organisms best adjusted to their environment are the most successful in surviving and reproducing. Darwin borrowed the term from English sociologist and philosopher Herbert Spencer, who first used it in his 1864 book Principles of Biology. (Spencer came up with the phrase only after reading Darwin’s work.)
Herbert Spencer's Principles of Biology (1864) first introduced the expression “survival of the fittest.”
Survival of the fittestQUICK FACTSKEY PEOPLEAlfred Russel WallaceHerbert SpencerRELATED TOPICSAdaptationNatural selectionDarwinian fitnessUse in evolutionary theoryDarwin did not consider the process of evolution as the survival of the fittest; he regarded it as survival of the fitter, because the “struggle for existence” (a term he took from English economist and demographer Thomas Malthus) is relative and thus not absolute. Instead, the winners with respect to species within ecosystems could become losers with a change of circumstances. For example, fossil evidence supports the notion that the mammoth (Mammuthus) was more fit during the most recent ice age (which ended roughly 11,700 years ago), but it became less fit as humans hunted it and the world’s climate warmed; fossil evidence suggests that the mammoth succumbed to extinction a few thousand years later.
Darwin’s theory of evolution by natural selection entailed three crucial elements: variation, reproduction, and heritability. Variations in the physical features of organisms that tend to benefit an individual (or a species) in the struggle for existence are preserved and passed on (or selected), because the individuals (or species) that have them tend to survive. The success or failure of a given variation is not known when it emerges; it is known only retrospectively, after organisms that possess it either grow and mature and pass it to their own offspring or fail to mature and reproduce.
Importantly, Darwin was influenced by the thinking of English physicist and mathematician Isaac Newton, whose system emphasized experimentation, mathematics, and logic over subjective sense experience. During Darwin’s time, his evolutionary theory was an attempt to construct a similar system for the living world, a frontier not yet crossed in the biological sciences.
Get a Britannica Premium subscription and gain access to exclusive content.
Some philosophers and scientists have suggested that the notion of survival of the fittest is an example of circular reasoning—that is, a tautology (a statement framed in such a way that it cannot be falsified without inconsistency). In tautologies, any true statements that follow are a matter of definition. Indeed, describing those that survive as the fittest is similar to stating that those that survive survive. British philosopher Karl Popper considered “survival of the fittest” self-evident at first; however, he changed his mind after realizing that Darwin posited variation axiomatically; that is, Darwin noted that all individuals did not start with the same set of characters (or traits). Therefore, the forces affecting survival did not weigh on individuals and species equally; there were always variations, some of which would prove favourable and confer fitness over others.
Explanation:
please give this answer as brainliest answer
Which of the following features exposed during glacial periods but covered by ocean water during non-glacial periods?
Answer:
Continental shelf
Explanation:
I checked in lesson also took the exam.
continental shelf exposed during glacial periods but covered by ocean water during non-glacial periods.
What is a continental shelf?The undersea boundary of a continent is known as a continental shelf. The seven major divisions of land on Earth are called continents. From a continent's shoreline to a point known as the shelf break, a continental shelf runs.
Due to its relative accessibility, the continental shelf is the area of the ocean floor that is most understood. The continental shelf is where the majority of commercial sea resource extraction occurs, including the extraction of hydrocarbons, non-metallic ore, and metallic ore.
Thus, the continental shelf is exposed during glacial periods but covered by ocean water during non-glacial periods.
Learn more about the continental shelf, here:
https://brainly.com/question/383674
#SPJ6
Can you guys please help me? I really need to finish this asap. Thanksssss <3
At one time, scientists classified fungi as non-photosynthetic plants. What is one characteristic of fungi that led scientists to realize that fungi are not plants?
a. Their cells do not contain nuclei.
b. Their cell walls contain chitin.
c. Some live in symbiotic relationships.
d. They reproduce both sexually and asexually.
Answer:
b
Explanation:
their cell walls contain chitin unlike plant cell walls which contain cell walls
Which of the following is not true about renewable energy sources?
They do not pollute the air.
They can help save energy costs.
They do cause an increase in greenhouse gases.
They do not use up a finite supply of a resource.
Answer:
They do cause an increase in greenhouse gases.
Explanation:
Renewable resources are the resources that are available in abundance that do not have adverse effect to the nature. These resources are available in abundance and they are not subject to extension. They are also said to be known as clean energy. renewable energy is obtained by the renewable resources. The pollution is caused minimal and the energy is saved by the use of renewable resources.
Answer:
C. they do an increase in greenhouse gases
Explanation:
5
Select all the correct answers.
Which situations describe an elastic collision?
Two glass marbles bounce off each other.
Rodrick flops onto his sofa and sinks into the cushion.
ОООО
A tossed water balloon flattens when it lands on the grass.
A bowling ball knocks over five pins.
Reset
Next
Why did Gregor Mendel use peas in his experiments?
Peas grow very slowly.
Pea reproduction cannot be controlled.
Peas normally produce very few offspring.
Peas have characteristics that have two forms.
Answer:
He used peas because they are self pollinating,they grow fast,and they have many traits
Answer:
D. Peas have characteristics that have 2 forms
Explanation:
Edge 2022.
If the activation energy required for a chemical reaction were reduced, what would happen to the rate of the reaction?
O The rate would increase.
The rate would decrease.
O The rate would remain the same.
O The rate would be zero
all prokaryotes are single-celled organisms. compare prokaryotes and eukaryotes. select the characteristics that only apply to prokaryotes.
•these cells contain membrane bound organelles.
•these cells have DNA contained in nucleus.
•these cells have DNA in a region called the nucleoid.
•some of these cells have structure like flagella and microvilli.
•these cells have cell walls made of polypeptides and polysaccharides.
•these cells have cell walls made of cellulose.
These cells have DNA in a region called the nucleoid.
-Some of these cells have structures like flagella and microvilli.
-These cells have cell walls made of polypeptides and polysaccharides.
Answer:
These cells have DNA in a region called the nucleoid.
-Some of these cells have structures like flagella and microvilli.
-These cells have cell walls made of polypeptides and polysaccharides.
Explanation:
The cell membrane controls what enters and leaves the cell. Which of the
structures in the diagram below is the cell membrane?
E
F
B
Ο Α.Ε
OB. A
Ос. В
ODC
C shows the structure of the cell membrane
which definition goes where idefk I’ll give u brainlist biology teacher driving me nuts omfmsjajhahwahsn
The arrows in a food chain show: a Who eats who b Heat energy being lost c The movement of energy between organisms d The route of food to the shops
Answer:
c The movement of energy between organisms
Explanation:
Pyramid of energy is a model used to depict the flow of energy from one trophic level or feeding level to the next in an ecosystem. It's a diagram that compares the energy used by organisms at each trophic level of the food chain. The pyramid of energy must never be inverted or turned upside down.
The units used in the construction of pyramids of energy is kilocalories (kcal) or energy per area per time (Jm-²year-¹).
This ultimately implies that, the arrows in a food chain show the movement of energy between organisms such as from producers which are autotrophs or self-feeders such as plants to the tertiary consumers.
Furthermore, a list of the types of organisms in an eco pyramid are;
I. Producers: these are autotrophs or self-feeders such as plants.
II. Primary consumers: these are herbivores that typically feed on plants such as a goat or deer.
III. Secondary consumers: these consists of carnivores that typically feed or eat flesh such as lion, tiger, cheetah, etc.
IV. Tertiary consumers: these are higher predators such as humans that aren't normally fed on by other organisms in the ecosystem.
Answer: The arrows in a food chain show (The movement of energy between organisms). The correct option is C.
Explanation:
In an ecosystem, a food chain shows the transfer of energy and nutrients ( food) from organisms to organisms in a feeding pathway. Instead of giving functional group names such as primary producer, primary consumer and so on, in a good chain, the organism at each step is identified. Thus,
Grass-------> Zebra ---------> lion
(Primary (Primary ( secondary
producer). consumer) consumer)
this is an example of a simple food chain in a grassland ecosystem. This ARROWS represented above shows the direction of energy flow through an ecosystem.
Furthermore, the grass traps solar energy and stores it as chemical energy in the food made during photosynthesis. When eaten by Zebra, which is the primary consumer, the energy stored in the grass is transferred to the consumer. This transfer is inefficient as some of the stored chemical energy is lost as heat. When the zebra is eaten by a Lion,which is the secondary consumer.
DNA is a
A. lipid
B. nucleic acid
C. carbohydrate
D. protein
Answer:
B
Explanation:
Answer:
B. nucleic acid
Explanation:
DNA is a type of Nucleic acid.
What must happen before meiosis can begin?
A. Four gametes must be produced.
B. The four tetrads must be pulled apart.
C. DNA doubles and produces sister chromatids.
D. The cell membrane pinches together.
The process that must happen before meiosis can begin is that DNA doubles and produces sister chromatids (Option C).
What is meiosis?Meiosis is a cell division process that generates four daughter cells having half of the DNA when compared to the parental cell.
Meiosis needs first the duplication of the genetic material by means of a synthesis stage (S phase).
In conclusion, the process that must happen before meiosis can begin is that DNA doubles and produces sister chromatids (Option C).
Learn more about meiosis here:
https://brainly.com/question/8253366
#SPJ1
HELP I NEED HELP ASAP HELP I NEED HELP ASAP HELP I NEED HELP ASAP HELP I NEED HELP ASAP
HELP I NEED HELP ASAP HELP I NEED HELP ASAP HELP I NEED HELP ASAP HELP I NEED HELP ASAP
Explain how different types of cells help organisms live and grow?
Different types of cells have different jobs that are necessary to keep organisms alive.
Different types of cells are only found in specific types of organisms.
Cells are necessary in order for all organisms to grow big and hunt for their food source.
Cells provide support for all organisms to be able to move.
Answer:
Different types of cells have different jobs that are necessary to keep organisms alive. And cells also give the living animal more support. They also hold the genetic information of that organism in their nucules. This is with most cells but bacteria cells do not contain nucules.
The
store(s) more carbon than the atmosphere.
O rock
trees
oceans
Osoil
Answer:
Oceans
The oceans are a massive carbon sink, and part of the positive reinforcement of the greenhouse gas cycle is that, as the oceans become warmer, then tend to release more carbon dioxide dissolved in the water which in turn drives temperatures warmer.
How many amino acids must be obtained in the diet because they cannot be made by the body?
2
5
10
20
amino acids we obtained in the diet about 10
When new molecules are introduced to one isolated area of a solution, there will temporarily be a high concentration of those molecules in one area of the solution. What is the name for the spontaneous process of dispersing these molecules to create a uniform concentration throughout the solution?
1. osmosis
2. transport
3. filtration
4. diffusion
Answer:
4.Diffusion
Explanation:
Diffusion if the movement of particles from a region of high concentration (where there is many) to a region of low concentration (where there is less) until it is evenly distributed.
Which of the following statements accurately describes the rock cycle?
Question 1 options:
A. Sedimentary, igneous, and metamorphic rocks are formed and broken down
B. The rock cycle only describes the formation of rocks, not the transportation or deposition
C.The rock cycle only describes the formation of rocks above ground
D.The rock cycle only describes how igneous rocks are formed
Answer: The Answer would be A
Explanation:
a) ¿Qué son las enzimas y por qué se las denomina catalizadores biológicos?
Answer:
las enzimas son proteínas y aceleran reacciones químicas.
Unlike other cell parts, mitochondria can accumulate mutations with every cell division. Why? A. Mitochondria exist outside of the cell's nucleus b. Mitochondria are susceptible to toxins c. Mitochondria have their own DNA d. Mitochondria are fragile
Answer:
c. Mitochondria have their own DNA
Explanation:
What rock and type of rock was found at the triangle shaped landform on Mars?
Answer:
heeya I'm jessyour answer is herethe triangle shape solid rock that form over time is called an alluvial fan.Explanation:
hope it may help you oopa/cissy whatever hahahawhat is the primary source of engery in a food chain ?
The diagram below indicates the nucleus of an animal cell. nucleus Image courtesy of NIGUSNIH How does the nucleus of the cell contribute to the overall function of the cell? A. The nucleus changes sunlight to cellular food. B. The nucleus makes energy for the cell. C. The nucleus provides structural support for the cell. D. The nucleus regulates all cellular activity.
Answer:
D. The nucleus regulates all cellular activity
Answer: D. The nucleus regulates all cellular activity
It is projected that an increase in carbon dioxide levels in the atmosphere will MOST LIKELY lead to _____.
Select one:
a. lower-than-average hurricane rates
b. higher-than-average ice levels in arctic
c. higher-than-average sea levels
d. lower-than-average ocean temperatures
What is the function of hemoglobin?
A. to carry oxygen
B. to carry carbon dioxide
A. To carry oxygen
hope it is helpful to you
What is a pioneer species? (Will give brainiest)
Answer:
The first species to colonize an ecosystem that is previously damaged or disrupted. Supplement. Pioneer species is the first to colonize an ecosystem previously disturbed or damaged. For example, sand that has become barren is colonized by a pioneer species of lyme grass (Leymus arenarius)
Explanation:
Mushrooms are a type of fungus. What characteristic of fungi makes them different from plants?
A. Fungal cells are eukaryotic.
B. Fungi are multicellular.
C. Fungi are heterotrophic.
D. Fungi have cell walls.
Answer:
C. Fungi are heterotrophic.
Explanation:
Mushrooms are a type of fungus. Fungi are heterotrophic, this characteristic of fungi makes them different from plants.
The graph below shows the population of mice living in a certain area over fifteen years Which numeral on the graph points to a time when the birth rate exceeded the death rate of the mice?
I
II
III
IV
Answer:
I
Explanation:
In section I, the graph has a positive slope.
Birth rate - death rate = positive, the birth rate is more than the death rate
Sections II and IV have a balanced population where the birth and death rate are the same
In section III the death rate exceeds the birth rate
The numeral I on the graph points to a time when the birth rate exceeded the death rate of the mice.
What is death rate?The mortality rate, also known as the death rate, is a measure of the number of deaths in a given population per unit of time, scaled to the population's size.
The birth rate is the number of people born in a population in a given period of time. The number of people born per year per 1000 in the population is referred to as the human birth rate.
In section I, the graph has a positive slope. Birth rate and death rate difference is positive here, it means the birth rate is more than the death rate.
Sections II and IV have a balanced population with the same birth and death rates. Section III has a higher death rate than a higher birth rate.
Thus, the answer is numeral I.
For more details regarding birth and death rate, visit:
https://brainly.com/question/14148819
#SPJ2
7. What biological process occurs after there has been a disturbance such as a flood, or a tornado-in an established ecosystem?
Answer: Ecological disturbance, an event or force, of nonbiological or biological origin, that brings about mortality to organisms and changes in their spatial patterning in the ecosystems they inhabit. Disturbance plays a significant role in shaping the structure of individual populations and the character of whole ecosystems.
Explanation: Source where I got the answer from: https://www.britannica.com/science/ecological-disturbance
You can copy the link and paste.put it in the search and click and there you go.