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pochemuha
3 years ago
5

Sharks have existed on Earth for centuries, even thousands of years with very little change to their structure. Why do you think

that is? Defend your answer.
Biology
1 answer:
iris [78.8K]3 years ago
6 0

Answer:

Sharks, in their basal form have been on Earth for hundreds of millions of years.  They were the first to develop a stream-like, torpedo shaped body and created a niche for themselves. Their aerodynamic body shape has evolved to allow for efficient and dynamic movement in water. Having a cartilage instead of bones allowed them to grow large and still be relatively light and buoyant . After they've evolved flexible, protruding jaws, there wasn't much to change. They were able to adapt and exploit all the water habitats as the world was changing.

Explanation:

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FrozenT [24]

Answer:

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Explanation:

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2. Gene is the physical unit of heredity i.e a segment of DNA transferred from parents to offsprings. A gene also encodes a useful products such as protein.

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A client with a potassium level of 5.5 meq/l is to receive sodium polystyrene sulfonate (kayexalate) orally. after administering
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