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ella [17]
3 years ago
7

What needs to present for evolution to occur

Biology
1 answer:
oksano4ka [1.4K]3 years ago
5 0

Answer:

Four conditions are needed for natural selection to occur: reproduction, heredity, variation in fitness or organisms, variation in individual characters among members of the population. If they are met, natural selection automatically results.

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What are the subatomic parts of the atom and what is their charge ?
ValentinkaMS [17]

The subatomic parts of an atom are the protons, neutrons, and electrons. Protons have a positive charge, neutrons have a neutral(no) charge, and electrons have a negative charge.

6 0
3 years ago
What is a climax community A. Two species that have the same niche B. a group of invasive species C. a community with very littl
Phantasy [73]

im not really sure but i think the answer is C (not 100% sure)

~batmans wife

4 0
3 years ago
An organism's genome is analyzed and found to contain 18% guanine. What percentage of that organism's DNA is adenine?
Oxana [17]

Answer:

32%

Explanation:

According to Chargaff in his complementary base pairing rule, he stated that the proportion of purine and pyrimidine bases is equal to 100%

That is, A + T + G + C = 100%

Where A=T and G=C i.e the proportion of each base pair is equal.

Hence, if the Guanine content is 18%, it means the Cytosine content of that DNA molecule must also be 18%. Therefore:

18 + 18 + A + T = 100

A + T = 100 - 36

A + T = 64

If the sum proportion of Adenine and Thymine is 64% and each must contain equal proportions, A or T = 64/2 = 32

Hence, Adenine contains 32%, likewise Thymine.

6 0
3 years ago
Explain why cold-blooded organisms like reptiles have a higher rate of secondary productivity than warm-blooded mammals.
PIT_PIT [208]
Warm-blooded creatures, like mammals and birds, try to keep the inside of their bodies at a constant temperature. They do this by generating their own heat when they are in a cooler environment, and by cooling themselves when they are in a hotter environment. To generate heat, warm-blooded animals convert the food that they eat into energy. They have to eat a lot of food, compared with cold-blooded animals, to maintain a constant body temperature. Only a small amount of the food that a warm-blooded animal eats is converted into body mass. The rest is used to fuel a constant body temperature.
7 0
3 years ago
Read 2 more answers
In cells, some molecules can move down their concentration gradients by crossing the phospholipid portion of the membrane direct
Kay [80]

Answer:

In cells, some molecules can move down their concentration gradients by crossing the lipid portion of the membrane directly, while others must pass through membrane proteins in a process called facilitated diffusion.

Explanation:

<h2>Follow instagrm at --> mvnnyvibes</h2>
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2 years ago
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