Negative feedback mechanisms are common among plants and animals while positive feedback mechanisms are very rare. Why are negative feedback mechanisms so much more prevalent?
A) Positive feedback mechanisms have a higher energy cost.
B)Negative feedback mechanisms provide energy for cell growth.
C)Positive feedback mechanisms evolved much later than negative feedback mechanisms.
D)Only negative feedback mechanisms lead to homeostasis, important for life.

Match each organ or function with its body system. produces urine large intestine ureters mouth filters blood absorbs nutrients from food

Galaxy whose shape seems different follow no set pattern are classified as

Two male mice, which we will call male a and male b, are both phenotypically normal. male a was from a litter that contained half phenotypically normal mice and half dwarf mice. the mother of male a was known to be homozygous for the normal igf2 allele. male b was from a litter of eight mice that were all phenotypically normal. the parents of male b were a phenotypically normal male and a dwarf female. male a and male b were put into a cage with two female mice that we will call female a and female b. female a is a dwarf and female b is phenotypically normal. the parents of these two females were unknown, although it was known that they were from the same litter. the mice were allowed to mate with each other, and the following data were obtained: female a gave birth to three dwarf babies and four normal babies. female b gave birth to four normal babies and two dwarf babies. which male(s)mated with female a and female b? male a with both females male a with female b, and male b with female a male a with female a, and male b with female b could not be determined male b with both females