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2 years ago

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:

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:

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:

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