Why are ecological pyramids shaped as pyramids?
a. because there is a large decrease in the amount of energy or biomass as you move from one trophic level up to the next
b. because the movement of energy through the biosphere follows a path similar in shape to a pyramid
c. because decomposers form a wide base of support at the bottom of a food web similar to the base of a pyramid
d. because food webs are usually triangular in shape

Can someone me with this and tell me what’s fracking and what does it have to do with carbon, carbon dioxide, or fossil fuels?

What sentence best supports the statement that hormones are involved in the regulation of homeostasis? a. the hormone erythropoeitin increases the production of red blood cells when oxygen levels are low. b. the hormone oxytocin promotes labor contractions of the uterus during childbirth. c. the hormone melatonin induces sleep and its production is slowed by exposure to light. d. the hormone cortisol suppresses the immune system and is produced when the body is under stress.

What function does the limb sever in each animal? how are the limb bones of the four animals similar? based on these similarities what can be inferred about the evolution of the four animals.