In pigeons, the allele for normal feathers (f) is dominant to the allele for frizzy feathers (f). a homozygous dominant normal-feathered bird (ff) is crossed with a homozygous recessive frizzy-feathered bird (ff). how many different feather phenotypes are possible in the offspring?

An easy way to calculate the amount of energy available at each level is to what?

Lactic acid and energy are produced in muscle cells during choose 1 aerobic respiration cellular respiration anaerobic respiration cellular division

Which statement describes a way in which the digestive and excretory systems work together? a. the nephrons absorb nutrients from food going to the large intestine. b. the excretory system balances blood gases in the small intestine. c. the intestinal villi filter blood and send wastes to the bladder. d. the excretory system balances the salts and water obtained from digested food