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Vedmedyk [2.9K]
3 years ago
9

Economic systems _____________ natural systems.

Biology
1 answer:
My name is Ann [436]3 years ago
4 0

Answer:

the right answer is A.operate within

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In RNA, the amount of adenine present is always equal to what?
Ira Lisetskai [31]
The amount<span> of guanine </span>always equals the amount of cytosine<span>.

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3 years ago
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ancestors of giraffes with shorter necks could not reach branches high up in trees for food. this led to selection for longer-ne
hichkok12 [17]

With shorter necks, giraffe ancestors could not reach food-containing branches on tall trees. This resulted in the directional selection of giraffes with longer necks.

 

<h3>Why is choosing a direction necessary? </h3>

It nearly appears obvious that the giraffe's long neck developed as a result of a lack of food in the lower branches of trees. The giraffe has a significant advantage because it is taller than any other mammal and can feed where few others can. 

When compared to modern giraffes, the giraffe's ancient predecessors had a shorter neck. The plants that were lying at a higher level were inaccessible to them. Giraffe phenotypes have changed in various ways, and now have long necks to reach vegetation that is higher up. The extreme form is chosen above other features in directional selection. It was decided to choose the long-necked giraffe over the short-necked.

 

To know more about direction selection for longer necked giraffes visit:

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7 0
1 year ago
2. Most mutations are "silent." What does this mean?​
Zielflug [23.3K]

Explanation:

Silent mutations occur when the change of a single DNA nucleotide within a protein-coding portion of a gene does not affect the sequence of amino acids that make up the gene's protein.

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2 years ago
Suppose there was a bird that always sat on a horse’s back and ate the insects that would bite the horse. What term would descri
katovenus [111]

Answer: Mutualism

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Which is true of reabsorption in the distal convoluted tubule?
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