The degree of parental investment required often results in the non-random mating behavior called __________.
A. allopatry
B. fidelity
C. mate choice
D. preferability
C. mate choice
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All of the following tend to hold nutrients in estuaries for use by other organisms except:
a. adsorption onto silt particles. b. reduced numbers of filter feeders. c. the formation of pseudofeces. d. overturn.
The water and minerals absorbed by the roots
usually first enter the
a. xylem. b. pith. c. cortex. d. root hairs. e. endodermis
At present there are _____ primary lineages called domains
1.1 2.2 3.3 4.4 5.5
"Live and Active Cultures" on the label of many yogurt products means that
A. the product contains live bacteria. B. the product may become contaminated by microbes if exposed to air. C. the product was made by fermentation but then pasteurized. D. yeast cultures were used to produce the yogurt.