Homeostasis is ultimately regulated by the ____
a. brain
b. endocrine glands
c. oil glands
d. exocrine glands
e. circulatory system
ANSWER: a
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Axillary buds
A. add length to a plant. B. develop into roots when water is scarce. C. form flowers or branches. D. increase the diameter of a stem. E. form lateral meristems.
The diffusion of water across a plasma membrane is referred to as
A. active transport. B. osmosis. C. countercurrent flow. D. facilitated diffusion. E. bulk flow.
Aerobic respiration evolved in
a. some bacteria. b. some archea. c. animals. d. mitochondria. e. in some bacteria and some archea.
Which of the following correctly describes a reaction that has reached chemical equilibrium?
A) The rate of the forward reaction is equal to the rate of the reverse reaction. B) All of the reactants have been converted to the products of the reaction. C) All of the products have been converted to the reactants of the reaction. D) Both the forward and the reverse reactions have stopped, with no net effect on the concentration of the reactants and the products.