Growth slows down when populations reach carrying capacity because of
A. competition and resource limitation.
B. uniform dispersion patterns.
C. zero population growth.
D. per capita growth rate.
E. resource limitation and lognormality.
A. competition and resource limitation.
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The cortical reaction is triggered by
a. the acrosomal reaction. b. sperm entering the nucleus. c. a depolarization event. d. Ca+ ions. e. K+ ions
Sensitivity to allergens
a. may be triggered by stress. b. may be triggered by changes in air temperature. c. may be due to genetic predisposition. d. may be triggered by a and b only. e. may be due to genetic predisposition, and may be triggered by stress and by changes in air temperature.
A free radical takes what particle from a stable molecule?
a. a proton b. an electron c. a neutron d. an atom e. a hydrogen ion
Rhizobia help plants meet their ____ requirements by producing ____
a. nitrogen; NH3 b. phosphorus; PO4 c. potassium; K2O d. nitrogen; NO3 e. phosphorus; ATP