Steroid hormones are derived from what molecule?
A. peptides
B. protein
C. modified amino acids
D. glycoproteins
E. cholesterol
Answer: E
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A graph of "wolf kills vs. caribou density" rises rapidly and then flattens because ________
a. at higher prey densities, the predator cannot catch, eat, and digest the prey in a way that is proportional to prey density b. the wolf switches to a different prey c. it is a type I response d. the number of hiding places for caribou decreases
The ____ regulates the movement of food into the stomach and the ____ regulates the passage of food
into the small intestine.
a. epiglottis; gastroesophageal sphincter b. epiglottis; pyloric sphincter c. gastroesophageal sphincter; epiglottis d. gastroesophageal sphincter; pyloric sphincter e. pyloric sphincter; anal sphincter
Alleles carried on the X chromosome in humans occur in _____ copies in males
1.one 2.two 3.three 4.four 5.five
Once a theory is formulated, it is accepted as fact and never modified
a. true b. false