A human skin cell contains 46 chromosomes. How many chromosomes are present in a human egg cell?

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 line in the graph above best illustrates an effect of the carbon dioxide level in the blood on breathing rate before, during and after a period of exercise? 1.b,2.c,3.a,4.d

Which of the following is the scientific term for an organism that makes its food from inorganic materials? a. autotroph b. heterotroph c. embryotroph