When two related populations occupy geographically or spatially separate areas,they are called

Define the term 'Gene Pool'.

Observations from England support evolution by natural selection. Before industrialization, $P$ moths were more abundant on trees, whereas after industrialization, $Q$ moths were more abundant. Identify $Q$.

Who stated that human population grows geometrically?

Speciation is caused by

As a result of the excessive use of herbicides and pesticides,which types of varieties were selected in a short period?