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B.
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Answer:
The extinction of a large number of species within a relatively short period of geological time, thought to be due to factors such as a catastrophic global event or widespread environmental change that occurs too rapidly for most species to adapt.
Explanation:
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Multiple sclerosis (MS) is common known demyelinating disease of the central nervous system. In this disease, your immune system attacks the myelin sheath or the cells that produce and maintain myelin sheath.
These attack can cause inflammation and injury to the nerve sheath and ultimately to the nerve fibers that it surrounds. In Multiple sclerosis , the affected part is immune system that attacks the protective sheath (myelin) that coats over the nerve fibers and causes communication problems between your brain and the rest of your body. Gradually , the disease can cause permanent damage or deterioration of the nerves.
To learn more about Multiple sclerosis (MS) , here
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Answer:
D) cofactor necessary for enzyme activity.
Explanation:
Carboxypeptidase is an enzyme found in the digestive system whose function is to hydrolyze a peptide bond in the terminal carbon of a protein. Said enzyme contains a zinc atom in its active site and when losing a zinc atom it would lead to loss of the activity of the enzyme, making it of great importance for the activity of the enzyme.