The shell of a fertilized animal egg has what type of analog in angiosperms?
A) endosperm
B) carpels
C) fruit
D) seed coat
D
Biology & Microbiology
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What percentage of oxygen in the air is typically extracted by the mammalian lung?
A. less than 25% B. 26–50% C. 51–75% D. 76–90% E. 91–100%
Biology & Microbiology
When glucose is used as the energy source, the
largest amount of ATP is produced in a. glycolysis. b. acetyl-CoA formation. c. the Krebs cycle. d. substrate-level phosphorylation. e. electron transfer phosphorylation.
Biology & Microbiology
In hydrogen bonding, hydrogen nearly always pairs with:
A) another hydrogen. B) sodium or chlorine. C) carbon. D) oxygen or nitrogen.
Biology & Microbiology
What part of the plasma membrane helps keep it fluid?
Biology & Microbiology