Phospholipid molecules that prevent the alveoli from collapsing are known as ________
A) laryngitis
B) surfactant
C) mucus
D) plasma
B
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In the amniote egg diagram shown, the item labeled "4" is the
a. yolk sac. b. chorion. c. allantois. d. amnion. e. albumin.
In the liver, the polysaccharide glycogen is broken down into glucose monomers. The glucose molecules are then released into the blood when blood sugar levels need to be raised. This process is an example of a(n) ________ reaction
A) kinetic B) potential C) exergonic D) endergonic
The rate of extinction picks up dramatically during a(n) __________, when a large proportion of Earth's organisms become extinct in a relatively short period of geologic time.
Fill in the blank(s) with the appropriate word(s).
Current research in behavioral ecology focuses on the overall contribution that behavior makes to an animal's
A. competitive strategies. B. learning. C. length of life. D. foraging efficiency. E. fitness.