What is a type of postzygotic reproductive isolating mechanism?
a. temporal isolation
b. mechanical isolation
c. behavioral isolation
d. hybrid sterility
e. sexual deselection
ANSWER: d
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Which structure-function pair is mismatched?
A) nucleolus â€" production of ribosomal subunits B) lysosome â€" intracellular digestion C) ribosome â€" protein synthesis D) Golgi â€" protein trafficking E) microtubule â€" muscle contraction
Optimal conditions for most mycobacterial cultures are:
a. 25°C to 30°C in the dark in an atmosphere of 2% carbon dioxide (CO2) and high hu-midity. b. 35°C in the dark in an atmosphere of 5% to 10% CO2 and high humidity. c. 35°C in the dark in a microaerophilic at-mosphere of 10% CO2 and high humidity. d. 32°C in the dark in an atmosphere of de-creased CO2 and increased humidity.
In a population of 2400 long horn sheep, 400 males and 750 females breed each season. What percentage of the actual population is the effective population size?
A. ~48% B. ~43% C. ~27% D. ~65% E. ~17%
________ involves distinguishing one illness from another.
Fill in the blank(s) with the appropriate word(s).