Which process ensures that seeds produced in temperate climates will not germinate before spring?
a. dormancy
b. scarification
c. vernalization
d. dispersal
c. vernalization
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Which of the following could be considered the most recent common ancestor of living tetrapods?
A) a sturdy-finned, shallow-water lobe-fin whose appendages had skeletal supports similar to those of terrestrial vertebrates B) an armored, jawed placoderm with two pairs of appendages C) an early ray-finned fish that developed bony skeletal supports in its paired fins D) a salamander that had legs supported by a bony skeleton but moved with the side-to-side bending typical of fishes E) an early terrestrial caecilian whose legless condition had evolved secondarily
What is a decrease in oxygen in the blood called?
A) hypoxemia B) hypocapnia C) hypoxia D) dysnemia E) anemia
The ability of animals to adjust to seasonal changes in temperature is called:a
acclimatization. b. estivation. c. homeostatic adjustment. d. torpor. e. hibernation.
Cartilage that forms at the end of long bones and functions to allow bones to slide past each other during movement is called ________
A) elastic B) hyaline C) bone D) fibrocartilage