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tester [92]
3 years ago
11

What conditions are required for evolution to occur?

Biology
1 answer:
Mamont248 [21]3 years ago
6 0

Answer:

Four conditions are required for evolution to occur: reproduction, heredity, variation in fitness or organisms, variation in individuals among the members of the observed population.

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What animal has long eyelashes and hair lined ears that block blowing sand can close its nostrils to keep sand out?
Sunny_sXe [5.5K]
The camel is the animal that has these characteristics.
5 0
3 years ago
Explain why the carnivores in an ecosystem tend to be fewer in number and have a smaller biomass than the herbivores in the same
allochka39001 [22]
The food supply of the carnivores in an ecosystem is the available herbivores, so in order for the carnivores to survive for an extended amount of time their population must be considerably less than their food supply, so that there is an abundance of prey available. Populations of predator and prey have a cyclic increasing and decreasing relationship to regulate the number of both.
7 0
3 years ago
Please explain the difference between a frameshift mutation and a base substitution mutation.
harina [27]

Answer:

A frameshift changes every codon past it. A base substitution only changes one codon.

Explanation:

DNA is comprised of nucleotides (A, C, T, G) that make up amino acids. Every three bases is called a codon and represents an amino acid.

In a frameshift mutation, a nucleotide is either added or deleted from the sequence. This offsets the entire sequence after it because the reading frame shifts. Here's an example:

ACTGCTATCGTCATC

If another T is added in between the first and second codons, then every codon after will be changed.

ACT>T<GCTATCGTCATC

A substitution mutation is usually less severe, as it only alters one codon in the sequence. These occur when one nucleotide is replaced by another one. Here's an example:

ACTGCTATCGTCATC

Let's say the first G is replaced by a T.

ACT>T<CTATCGTCATC

As you can see, none of the other codons changed.

Typically, a frameshift mutation is considered worse than a substitution mutation.

7 0
3 years ago
Read 2 more answers
What would be most likely to happen if some of the proteins in one of photosystems were to change shape due to a rise in cell pH
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I think the answer might be A. hope it helps
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3 years ago
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There are three phases in an action potential. they are __________.
luda_lava [24]
The three stages of Action Potential are:
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Hope this helps!
xo</span>
3 0
3 years ago
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