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Nuetrik [128]
1 year ago
13

Polar bears and grizzly bears share a common ancestor (similar to you and your cousin sharing a grandparent); Describe some sele

ctive pressures that may have caused speciation between these two types of bears.
Biology
1 answer:
Natali5045456 [20]1 year ago
7 0
Lasting genetic similarities make the two bears biological sister species, more closely related to one another than to any others. ... But Ursus maritimus has also evolved to match its polar environment, growing a longer snout than brown bears' and larger, paddle-like paws, both of which aid polar bears in hunting seals.
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Suppose that Gene B occurs in a sea turtle gene pool where the frequency of the B1 allele is 0.5 and the frequency of the B2 all
disa [49]

Answer:

Frequency of the B3 allele = 0.1

Explanation:

The allele frequencies in a given population remain constant which means that every generation will have the same gene pool across the generations. As per Hardy Weinberg’s first equilibrium equation, the sum of frequency of all the alleles at a given locus is equal to one  

Thus, if "p" represents the frequency of B1 allele and "q" represents the frequency of B2 allele and "r" represents the allele for B3 allele. Then, sum or "p", "q" and "r" is equal to one.

p+q+r = 1\\

Substituting the given values, we get -

0.5 + 0.4 + r = 1\\0.9 + r = 1\\r = 1-0.9\\r = 0.1

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2 years ago
n the case of penguins, being too far from your neighbor is too cold and too close to your neighbor increases the risk of having
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Answer:

Penguins in general are distributed close to each other to be able to withstand the extreme cold, characteristic of the ecosystems they inhabit. They also group together to incubate their eggs.

They perform a series of coordinated movements that help them fight low temperatures, being careful to drop the egg.

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1 year ago
An advantage associated with the Darrieus rotor is that it _____.
stepladder [879]
<span>Can utilize even low wind speeds to produce electricity.</span>
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1 year ago
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Which of the following statements is an accurate description of proteins? Which of the following statements is an accurate descr
Brut [27]

Answer:

b. the 20 amino acids found in proteins differ in the composition of their R groups, which may be either polar or charged.

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Since the proteins are polymers joined by a big number of amino acids, all the joins occur the same way because in all the amino acids there is always one part that is exactly the same in all of them.

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1 year ago
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