The ciliates<span> have both a </span>micronucleus<span> and </span>macronucleus<span>, which appear quite homogeneous in composition. The organelles of protozoa have functions similar to the organs of higher animals. The </span>plasma membrane<span> enclosing the </span>cytoplasm<span> also covers the projecting locomotory structures such as </span>pseudopodia<span>, </span>cilia<span>, and </span>flagella<span>.
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The answer is D. I hope it helps
They developed to be protected by the hard shell from parasites and ther predators.
Too much glucose is converted to glycogen. This results in dangerously low glucose levels in the blood, also known as hypoglycemia.