why terrestrial trophic pyramids usually do not have levels higher than tertiary consumers?

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.

Arepair man charged $93.06 the price included 2 hours of labor and 40 service charge how much does the repairmen charge per hour for labor?

For this question look at the hydropic diagram water that is heated by the sun evaporates. select the number that represents it.