Answer:
The correct option is <u><em>A. they evolved from land mammals.</em></u>
Explanation:
The process of evolution explains how closely one organism is to another based on their common ancestors. Scientists believe that those organisms which show many similarities in their structures or functions might have evolved from a common ancestor in the past.
As in the above-mentioned question, scientists have observed that cetaceans lack gills and breath air, this is a property of land mammals. The cetaceans have fin bones which are similar to the limb bones. As limb bones are present in land mammals, hence they cetaceans and land mammals might have common ancestors in the past.
An enzyme, it catalyzes the reaction to convert carbon dioxide into carbonic acid
Answer:
is a principle of geology that states that the geologic feature which cuts another is the younger of the two features. It is a relative dating technique in geology.
<span>It takes years to become widely understood if it is misrepresented in order to influence public opinion
It is the only one with bad effects since the others may be annoying but they would provide safety.
</span><span>Im not leaning either way with this but global warming is not agreed on and many people will try to use that to influence people as an example </span><span />
