In the formula, dN/dt = rN(K-N)/K, the rate of population growth approaches zero as
A. carrying capacity approaches zero.
B. the age-specific fertility rate approaches zero.
C. the per capita growth rate declines.
D. the population size approaches the carrying capacity.
E. carrying capacity declines with increasing population size.
D. the population size approaches the carrying capacity.
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An individual is constipated. They take magnesium salts to help loosen the stool. Why does this work? A. Water moves from the intestines to the blood because the blood is hypertonic B. Water moves from the intestines to the blood because the blood is hypotonic
C. Water moves from the blood to the intestines because the blood is hypertonic D. Water moves from the blood to the intestines because the blood is hypotonic.
Gated channels are NOT utilized by the cell ____
a. to transport water b. to stimulate muscle contraction c. to generate nerve signals d. for facilitated diffusion e. to transport sodium
Which of the following statements about sister chromatids is false?
a. They arise by replication during S phase. b. They separate from each other during each mitotic anaphase. c. They usually contain identical versions of the same genetic information. d. They separate from each other during meiosis I. e. They are joined during prophase I and metaphase I at their common centromere.
The term ________ is used to describe a mutually beneficial association in which the growth of an organism is dependent on one or more growth factors, nutrients, or substrates provided by another organism in the same vicinity.
Fill in the blank(s) with the appropriate word(s).