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creativ13 [48]
2 years ago
12

Natural selection requires that individuals in a population are

Biology
1 answer:
jasenka [17]2 years ago
6 0

Answer:

Diverse

Explanation:

Natural selection can better occur when individuals are more naturally diverse.

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Vika [28.1K]

Answer:

uh

Explanation:

4 0
3 years ago
An owl has good night vision because its eyes can detect a light intensity as small as 5.0 × 10-13 W/m2. What is the minimum num
Lady bird [3.3K]

Answer:

Thus, the minimum number of photons per second is 77.34

Explanation:

Light intensity, I_{min} =  5\times 10^{-13} W/m^{2}

Pupil has a diameter, d = 8.5 mm

                                      = 8.5 x 10^{-3} m

Radius of the eye, r = 4.25 x 10^{-3} m

∴ Area of the eye, A = \pi .r^{2}

                                 = 3.14\times \left ( 4.25\times 10^{-3} \right )^{2}

                                = 5.6\times 10^{-5} m^{2}

Let P_{min} be the minimum number of photons.

Therefore, P_{min} = I_{min} x A

                                              = 5\times 10^{-13} x 5.6\times 10^{-5}

                                             = 2.8\times 10^{-17} W

Thus the minimum number of photons is given by

N_{min}=P_{min}/E

where E = hc/\lambda

             = \left (6.63\times 10^{-34}\times 3\times 10^{8}  \right )/548\times 10^{-9}

            = 3.62\times 10^{-19} J

Therefore, N_{min} = \frac{2.8\times 10^{-17}}{3.62\times 10^{-19}}

                                              = 77.34 photons per second

Thus, the minimum number of photons per second is 77.34

4 0
3 years ago
Question 2 of 9
sammy [17]

Answer:

A.

Explanation:

It shows a clear view of what a group of cells of a plant would be like.

4 0
3 years ago
List two background experiences/training opportunities that would be influential to a city planner​
tatiyna

Answer:

business and pharmacist

Explanation:

those are everyday thing your around

8 0
3 years ago
Read 2 more answers
Four hundred beetles of the same species were sprayed with an insecticide. Several weeks later, nearly all the beetles were dead
Kamila [148]

Answer:

D

Explanation:

Just trust me.  

it's not A because there's no such thing as favorable traits whenever it comes to incesticide and for B the majority of Beatles and future generations will also die that's only to the ones that died but that can not happen, which means that D is the one that will be the correct answer because if one lives, then the rest of the generations live due to immunity in the generation that started it.  

5 0
3 years ago
Read 2 more answers
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