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Ivahew [28]
3 years ago
14

Please help, A, B,C, or D?

Biology
1 answer:
TEA [102]3 years ago
6 0

Answer:

I cant see the pic??

Explanation:

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Why is the nucleus important?
iragen [17]

Answer:

it contains and protects the cell's DNA

3 0
3 years ago
Why is the nitrogen cycle important for the survival of organisms in an ecosystem? A. The nitrogen cycle recycles nitrogen throu
Dahasolnce [82]

Answer: A.) The nitrogen cycle recycles nitrogen through an ecosystem, making it available to all organisms.

Explanation: Nitrogen is an essential nutrient for plants and a significant component of proteins, which all animals need to grow, reproduce and survive. The nitrogen cycle converts nitrogen into compounds that plants and animals can use.

8 0
3 years ago
suppose you found a bone of a mastodon which had 6.25%c14and93.75%n14 how long ago did this animal die​
lisabon 2012 [21]

Answer:

t= 3886.18 years old

Explanation:

Whenever an animal dies de C14 and N14 begin to disintegrate in such a way that the proportion between C14 and C12 decreases, with a semi-disintegration period of 5.730 years, T. To get to know how long it takes an element to disintegrate, we must use this semi-disintegration period, which is the time it takes until the amount of the element is reduced to its half.  

We can find the age of the fossil, t, by using the next formula:

t = - (T x ln (C14))/ ln (2)

t = - (5730 x ln (0.625)/0.693

t= - (-2693.12)/0.693

t= 3886.18  

3 0
3 years ago
Which factor would affect photosynthesis the least? amount of carbon dioxide in the air nitrates in the soil amount of light ava
Elenna [48]
The factor that would least affect photosynthesis is Nitrates in the soil.
Photosynthesis is the process by which plant make their own food by utilizing energy from sunlight, water and carbon dioxide. The limiting factors that affect photosynthesis are the light intensity, carbon dioxide concentration, temperature and water. Without enough light, a plant cannot photosynthesize very quickly, even if there is plenty of water and carbon dioxide. 
3 0
3 years ago
What are the basic building blocks of the cell membrane called?
EastWind [94]

Answer:

Phospholipids

Explanation:

I don't actually know the reason for it

5 0
3 years ago
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