<span>Evolution can best be summed up by statement D - change in a population through genetic variation over time. The other statements do not refer to evolutionary changes, as these are changes that occur slowly, rather than suddely or with speed.</span>
I believe it is "All living organisms are composed of cells."
C. density because no matter the size of the substance the density will always be the same
Returning by-catch to the sea is not always useful as the sudden change in pressure will result in damage to internal organs of fishes.
<h3>What is by-catch?</h3>
By-catch refers to other sea animals which are caught along with the intended catch in a fishing expedition.
In some instances some people tend to return by-catch to the sea.
However, this is not always useful as the pressure above sea level or on the sea surface is less than that in the depths of the sea.
A sudden change in pressure will result in damage to internal organs of fishes.
Therefore, returning by-catch to the sea not always useful as it might appear.
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