Skeletal muscles work in pairs because? O muscle cells are involuntary
muscle tissue is striated
O muscle cells can relax and contract
O muscle tissue is smooth

Which process must a cell undergo top identical cells at the end of cell division

Which conditions are necessary for natural selection to occur? select all of the answers that apply. a. inheritable adaptations vary among individuals. b. the population size is increasing. c. more individuals are born than can survive. d. fitness varies among individuals. e. the environment changes suddenly and drastically.

Which of the following is a testable hypotheses?