The environmental protection agency was formed in 1970 and began to monitor the environmental impact of united states companies, forcing many to change some of their practices. which exchange in the immediate environment is this an example of

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.

Amylase is an enzyme found in the human digestive system. why do you think it was important to keep the enzyme temperature above 37 degrees celsius (98.6 degrees f)? describe what might happen if the temperature decreased by 10 degrees celsius.

Which blood cell spend most of their time in the lymphatic system?