Answer:
They had to eliminate allopatric speciation and subsequent dispersal as a hypothesis.
Explanation:
Allopatric speciation is produced by geographic speciation, thereby the genetic differences observed among organisms might be a consequence of this mechanism
. The rejection of this hypothesis may imply sympatric speciation
<span>Cell membranes protect the cells that is why they are called the gatekeepers of the cell. A cell membrane can be internal or external like that of the case of eukaryotic cells with internal cell membrane. It is mostly made up of glycerophospholipids. This compound like other lipids is also soluble in water however, their unique geometry allows them to aggregate into bilayers without too much energy input. Cholesterol can also be found in the cell membranes however, it is not as abundant as the glycerophospholipids.</span>
The correct option is B.
Rocks are solid mineral materials that form part of the surface of the earth; they can be exposed on the surface of the earth and they can also be found underneath the earth. Rocks are classified on the basis of their formation and there are different types of rocks. Rocks are considered to be mixtures of different minerals.
