What function do estuaries play in commercial fisheries?
a. They provide mating grounds
b. They provide temporary shelter for adults.
c. None of these choices.
d. They serve as a nursery to juveniles.
d
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Parasitism is a density-independent factor of population control
Indicate whether the statement is true or false.
Which of the following is TRUE at the end of
telophase I in corn (20 chromosomes)? a. Each cell has 10 chromosomes. b. Each chromosome is double-stranded. c. Centromeres connect sister chromatids. d. Each cell has 10 chromosomes, and each chromosome is double-stranded. e. Each cell has 10 chromosomes, each chromosome is double-stranded, and centromeres connect sister chromatids
The presence of an antibiotic in the media where the bacteria are grown enables the selection of colonies grown from
a. transformed cells. b. nontransformed cells. c. cells that have the gene for resistance to the antibiotic. d. both a and c.
Papillary muscles are attached to the cusps of valves by thin, strong connective tissue strings called
A. the chordae tendineae. B. the interventricular septa. C. the auricles. D. the interventricular sulcus. E. the coronary sinus.