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Yuri [45]
2 years ago
12

Can someone plz help me? :(

Biology
2 answers:
Allushta [10]2 years ago
5 0

Answer: C. A snake hides under a rock on a hot day.

Explanation:

Thirst, hunger, and pathogens are internal issues (meaning inside of the body). Weather (heat) is something from the external environment that the snake is responding to (hiding). Therefore, the correct option is C.

Let me know if you have any questions!

<em>Question: Which behavior is a response to an external stimulus?</em>

<em>A. A dog drinks to quench its thirst.</em>

<em>B. A squirrel eats when it is hungry.</em>

<em>C. A snake hides under a rock on a hot day.</em>

<em>D. A cat vomits to rid itself of pathogens.</em>

Katarina [22]2 years ago
4 0

Answer: I'm pretty sure it's B but I could be wrong good luck!

Explanation:

An External Stimulus is a stimulus that comes from. outside an organism. example: You feel cold so you put on a jacket.

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small group of 100 people decide to isolate themselves from the world and move to a small and remote deserted island. Out of thi
irina [24]

Answer:

Frequency of p = 0.684

Frequency of p = 0.316

Number of individuals with homozygous dominant (AA) = 47

Number of individuals with heterozygous (Aa)= 43

Number of individuals with homozygous recessive (aa) = 10

Explanation:

Out of 100 people, 10 have albino skin (aa)

So, the frequency of homozygous recessive individuals (q^{2}) is \frac{10}{100} = 0.1

Now, q will be

= \sqrt{q^{2} } = \sqrt{0.1} \\= 0.316

As per Hardy Weinberg's equation -

p + q = 1

Substituting the value of q in above equation, we get -

p + 0.316 = 1p = 1 -0.316\\p = 0.684

Now the frequency of homozygous dominant (AA) will be

p^{2} = 0.684^{2} \\= 0.467

Hence, out of 100 people 0.467 * 100 = 46.7 or 47 people are homozygous dominant (AA)

Like wise out of 100 people 0.1 * 100 = 10 people are homozygous recessive (aa)

As per As per Hardy Weinberg's equation-

p^{2} + q^{2} + 2pq = 1\\

Substituting the values in above equation, we get -

0.467 + 0.316 + 2pq = 1\\2pq = 1 -( 0.467+ 0.1)\\2pq = 0.433

So, out of 100 people 0.433 * 100 = 43.3 or 43 people are heterozygous (Aa)

7 0
4 years ago
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