Speciation is the
process by which new and distinct species are formed. One of the most important
factors necessary for speciation to occur is the genetic isolation of two
populations. This genetic isolation can, over long periods of time, cause these
two groups to become genetically incompatible. Factors that can lead to this
genetic isolation include geographic separation and hostility among population
groups.
A gene pool is a collection of all the genes in a population. This can be any population - frogs in a pond, trees in a forest, or people in a town.
An earthworm removes undigested food by either throwing it up, or getting rid of it from the other end. Hope I helped! ;-)
The warm ocean water is usually found near the top surface of the ocean. The sun makes the surface of the ocean warm and thus heat up its water. This heat is later mixed by the winds and sea waves from top to beneath the ocean surface. The temperature of the surface is usually warmer than the water at depths as it does not receive sun light. The average ocean temperature at the surface is 17 degree Celsius while at greater depth the temperature falls down to 0 to (-3) degree Celsius
Answer:
B. i think, sorry if i am not right
