In a particular mouse species, two extremes of a phenotype are equally selected for over several generations. as a result, the genetic frequency for these two phenotypes begins to increase over the preexisting mean trait. what type of selection has occurred?

'which of these statements about the scientific method is not true? all experiments must follow the same number of steps in the procedure. experiments may be repeated several times. some unexpected results can be beneficial. experimental results may or may not support the hypothesis.

Does any one know what blood tastes like

What is the name of the idea that energy cannot be created nor destroyed