How much energy is available to organisms on the 5th trophic level compared with this on the 1st? how does this determine how long a food chain can be?

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 type of neuroglia is found outside of the brain?

Identify the composition of oceanic and continental crystal rocks.in a model of earth’s interior,where would these rocks appear?