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3 years ago

Different between prokaryotic cells and eukaryotic cells. 9th grade biology

Biology

1 answer:

antoniya [11.8K]3 years ago

3 0

Answer: It's B

Explanation: :) I hope this helps

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PROCEDURES: Excision squamous cell carcinoma, left leg with excised diameter of 2.5 cm, repaired with a split-thickness skin gra

kkurt [141]

Answer:

The CPT codes vary according to the country where you live, such as in Peru, the CPT code of the injury you name is 1 D 99 A 4 A.

Explanation:

That is why so that you know exactly what code it is, clarify in the question where I needed the CPT from.

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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

PLEASE HELP WILL MARK BRAINELLEST!!!!!!!

Alinara [238K]

Answer:

i need more info to do it

Explanation:

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3 years ago

Explain how seasonal fires benefit grassland ecosystems.

Soloha48 [4]

Answer:

Without fires, there would be no life on Earth . Fires are key to maintaining the proper oxygen concentration in the atmosphere; fire regulates the carbon cycle and life, as we know it, is based precisely on carbon

Explanation:

Although we tend to think of fires as a human invention that kills plants, animals, people, fire, as with rain or wind, is an essential natural component, basic to maintain the planet's biodiversity.

As for example, grassland ecosystems are also benefited by the same fires that allow renewal, and generate natural sustainability on the earth through the carbon cycle.

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3 years ago

which of the following distinguished living things from nonliving things? A. living things are made up of cells nonliving things

katovenus [111]

<span>the answer is B. living things</span>

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3 years ago

Read 2 more answers