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2 years ago

Sometimes a little stress can help you to become

Biology

1 answer:

Inessa [10]2 years ago

8 0

Answer:

That black, sooty-looking substance on the skins of onions is indeed a mold, specifically, Aspergillus niger. It is common on onions, both in the field and once dried, bagged and stored. The fungus typically is found on the outside skins of an onion, and it is harmless, for the most part.

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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

Use homeostasis, tissue, and organ in a sentence

Hitman42 [59]

In a living thing, both tissue and organs are very important to maintaining homeostasis.

5 0

2 years ago

According to the article, why might Indians rationally choose not to eat cow even during times of starvation?

ludmilkaskok [199]

Answer:

Many Indians believe in Hinduism, which preaches that cows are sacred. They might choose not to eat cow even during times of starvation because they are afraid of the consequences that come in the afterlife. Because cows are sacred, Indians believe that eating them might incur a net negative benefit when considering the afterlife.

Explanation:

No article was provided and I don't particularly know much about the subject so this is my best guess. Please adapt this answer accordingly.

7 0

2 years ago

Which of the following is composed of two layers of lipids and protects the cell from the surrounding environment?

Elden [556K]

C. the cell membrane.
the membrane let's things in and out of the cell.

3 0

2 years ago

Read 2 more answers

How does lying on a rock help a turtle maintain homeostasis?

Sholpan [36]

Answer:

It helps them stay safe from predators, weather, or temperature making sure they survive

5 0

2 years ago