What happens to the ATP molecule after it has been used to do work?
A) It breaks down into carbon dioxide and water.
B) It is split into two molecules of pyruvic acid.
C) It loses a phosphate group and is converted to ADP.
D) It is completely destroyed.
C
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The combined function of the malleus, incus, and stapes is to ____
a. convert the mechanical vibration of the tympanic membrane into a pressure wave in the cochlear duct b. amplify the vibrations of the ear drum c. equalize the pressure on both sides of the tympanic membrane d. convert the oval window's vibrations into vibrations of the tympanic membrane e. dampen the vibrations of the tympanic membrane
A(n) ____________________ molecule is at the center of each heme group in hemoglobin. Fill in the blank(s) with the appropriate word(s)
Which type of cell produces proteins that form the tough, water-insoluble layer in the skin?
a. melanocytes
b. Granstein cells
c. keratinocytes
d. Langerhans cells
e. pigmented cells
Which of the following can cause evolutionary change in a small population?
A) Homozygous individuals B) Lack of mutations C) Genetic drift D) Lack of gene flow E) All recessive alleles