Which system is not necessary to an individual's life?
a)respiratory system
b)circulatory system
c)reproductive
d)digestive system

Afarmer has applied a pesticide to control a pest population that is affecting her crops. the pest population has reacted as shown below. which best describes the process that the pest population has experienced due to this environmental change? a genetic diversity b natural selection c natural resistance d genetic resistance

Which prefix mean under less or below

Sickle cell amelia is a condition condition where the red blood cells are deformed which is affected by sickle cell amenia