In the laboratory, what is added to media to stabilize the pH within acceptable limits?
A) Buffers
B) Proteins
C) Enzymes
D) Water
A) Buffers
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Plants that produce separate male and female flowers are said to be
A) hermaphroditic. B) heterosexual. C) monoecious. D) dioecious. E) homosexual.
In pulmonary emphysema, alveoli lose their elasticity
____________________ Indicate whether the statement is true or false.
_____________ selection favors organisms with phenotypes that are at one extreme relative to the average phenotype.
a) Disruptive b) Stabilizing c) Intermittent d) Directional e) Sexual
Acetylcholine (ACh) is released by motor neurons and binds to receptors on muscle cells to initiate action potentials. Some snake venom contains specific toxins that bind irreversibly to these receptors and block acetylcholine's ability to bind. If an
animal is bitten by a snake with these toxins in its venom, what do you predict would happen? A) The animal's muscle cells would increase production of myoglobin. B) The animal's muscles would contract uncontrollably. C) The animal's muscles would not be able to contract. D) The animal's muscle cells would show shrinkage in mitochondria.