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irina1246 [14]
3 years ago
11

To create a aquatic ecosystem that is self sufficient, there should be a fish and a ______.

Biology
2 answers:
PolarNik [594]3 years ago
6 0
B rock as a home for flourishing Sea life.
diamong [38]3 years ago
6 0

Answer:

I would say  the answer is C. PLANT

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What enzyme connects new nucleotides and proofreads them in separated DNA strands?
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<span>DNA polymerase is the enzyme that connects new nucleotides and proofreads them into separate DNA strands. 

This process is part of DNA replication. A cell's DNA is replicated before a cell divides. The two strands of a DNA molecule have complementary base pairs. Each strand in the pair consists of a nucleotide sequence which is able to provide the information to duplicate itself. Before the duplication occurs, the length of the DNA that is about to be copied must be unwound and the two strands must be separated. This is done by breaking the weak hydrogen bonds that link the pairs together. They must then be kept apart from each other to expose the bases so that the new nucleotide partners can bond to them. DNA polymerase is the enzyme that moves along the exposed DNA strand and joins the new nucleotides to manufacture a new DNA strand that is a duplicate of the original</span><span>
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5 0
3 years ago
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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Animal cells are not capable of producing their own food because they lack which organelle? Vacuole Chloroplast Cell wall
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Animal cells don't have chloroplasts, the food-making structure found in plant cells.
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3 years ago
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