What term describes the maximum population size that the environment can support indefinitely?
What will be an ideal response?
carrying capacity
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Which statement is false?
a. A nerve will not fire unless a stimulus exceeds the threshold. b. An action potential is an all-or-nothing event. c. An action potential continues indefinitely until a quenching signal is released. d. An action potential is self-propagating. e. An action potential transmission depends on activities at the membrane.
Photosynthesis produces more water than it uses
Indicate whether the statement is true or false
Which of the following does not occur in pulmonary emphysema?
a. The alveoli lose their elasticity. b. The surface area of the lung is greatly increased. c. Walls between adjacent alveoli become destroyed. d. The heart becomes enlarged from overexertion. e. Stale air accumulates in the lungs because it cannot be properly expelled.
Which of the following statements about the epicotyl is true?
A. It forms immediately above the secondary roots of a seedling. B. It remains in the ground after a seed has germinated. C. It is the portion of the stem axis that is directly below the cotyledons. D. It takes up most of the volume within a monocot or dicot seed. E. The shoot apical meristem of a seedling is located just above it.