Scientists who study evolution today do not like this definition because the reproductive compatibility of extinct organisms cannot be tested and the definition is unsatisfactory for organisms that reproduce asexually. These favorable characteristics are then passed on to their offspring. No mutations occur. Individuals neither enter nor leave the population through migration. The population is large.
Individuals mate randomly.
Natural selection does not occur. This assignment must be turned in by the beginning of class tomorrow to receive credit. Describe what happens during disruptive selection. A species of butterfly feeds on only one species of flower. Through many flower generations, the location of the nector moves deeper and deeper into the flower.