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bagirrra123 [75]
4 years ago
14

Protists are helpful to us because they?

Biology
1 answer:
Blizzard [7]4 years ago
4 0

Answer:

B) Help produce oxygen

C) Help make foods

D) Help break down dead materials

Explanation:

B - Life on Earth <em>depends</em> on protists since they are the ones who supply us with oxygen.

C - Provide food to other living organisms in food chains/webs.

D - Even, recycle important nutrients just for other life forms to use (some protists may also be decomposers; as they also release nutrients into the environment).

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3 years ago
What is the phenotype ratio for this cross
ivolga24 [154]

Hello!

Small note: I would rewrite your cross so the tT is written as Tt, and so the TT will be in the top left corner while the tt is in the bottom right.

The phenotype is the observable characteristics of an organism that we see. It is not the genetic makeup. In this case, we have two genes - one for tall stems and one for short. The tall stem gene is dominant, meaning that if there even is one copy of it, the plant will have a tall stem. On the other hand, the short stem gene is recessive, meaning that there must be two copies of it for it to be expressed.

Now, we see here the four genotypes: TT, Tt, Tt, and tt. There are three genotypes with at least one tall stem gene, meaning that three phenotypes will have a tall stem. There is only one genotype with two short stem genes, meaning that there will only be 1/4 of the plants with a short stem.

Therefore, our ratio becomes 3 tall stems : 1 short stem, or 3:1.

Hope this helps!

6 0
3 years ago
How are ionic and covalent bonds different from hydrogen bonds ?
loris [4]
Hello.

They are different because ionic and covalent bonds are closer then hydrogen bonds. And ionic and covalent bonds have a i<span>ntramolecular </span>bond becasue that is were the force excist. 
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3 years ago
Read 2 more answers
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Thus this collective efforts put pressure on the athletes to win at all cost.

3 0
4 years ago
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