North Atlantic current could possibly be an answer
The answer is A. True.
Plankton includes a diverse group of organisms that live in the water but are not capable of active swimming against the water current. On the contrary, nekton<span> includes a diverse group of organisms that live in the water but are capable of active swimming without the help of the water current. A shark is capable of active swimming, therefore, it is the example of nekton.</span>
The proteins encoded by genes within the same gene family have modularity if structure because : ( D ) gene families usually have similar DNA sequences and therefore similar protein structure.
A gene family is a set of similar genes that is formed by the duplication of single original gene, which has a similar biochemical function. natural selection affects the increase or decrease of a gene family.
Gene families have similar DNA sequence because the genes found in a gene family is from an ancestral gene, also their protein structure is similar
Hence we can conclude that gene families usually have similar DNA sequences and therefore similar protein structure.
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