Most nekton ____ the ocean?
A.swim in
B. drift at the surface of
C. attach to the bottom of
D. all of the above
http://www.nhptv.org/natureworks/nwep6e.htm
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To determine the correct answer, we need to understand what nekton refers to. Nekton refers to organisms that are capable of swimming and moving independently in water bodies. They include fish, whales, seals, and squid, among others.
Now let's evaluate each option:
A. Swim in: This implies that nekton organisms actively move and swim within the ocean. Since nekton are known for their swimming abilities, it is reasonable to assume that they swim in the ocean.
B. Drift at the surface of: Nekton organisms are typically active swimmers, rather than passively drifting at the surface of the ocean. It is less likely that they drift at the surface as that behavior is more commonly associated with plankton. Plankton do not have the ability to actively swim and rely on ocean currents for movement.
C. Attach to the bottom of: Nekton organisms are not typically known for attaching themselves to the bottom of the ocean. Bottom-dwelling organisms, known as benthos, primarily inhabit the ocean floor. Nekton, on the other hand, are more commonly found in the water column and actively swim in open water.
Given this analysis, we can conclude that the correct answer is:
A. Swim in: Most nekton organisms swim in the ocean.
Therefore, the option "D. all of the above" is not correct in this case, as nekton organisms do not fulfill the conditions of options B and C.