The core of nearly all cell membranes is a double layered sheet called a(an)

How many chromosomes does each human cell contain? a. 23 chromosomes b. 26 chromosomes c. 43 chromosomes d. 46 chromosomes

Which of the following is a true statement? a. individuals evolve to have adaptations. b. individuals have adaptations that can change over time. c. individuals have traits that may or may not make them successful at reproduction. d. populations cant evolve, only individual organisms.

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