Which interaction is advantageous to both populations?
a. commensalism
b. competition
c. mutualism
d. parasitism
e. predation
ANSWER: c
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When preparing vaccines, which of the following is the basis for the most effective and long-lasting immunity?
a. live viruses b. killed viruses c. subunit viruses d. DNA viruses
Crossing over occurs during
a. anaphase I. b. metaphase II. c. prophase I. d. prophase II. e. telophase II.
The endodermis
a. is the outer covering of the root. b. is part of the vascular tissue. c. contains the Casparian strip, which regulates the movement of substances. d. is none of the above.
Y-linked traits are ____
a. known as homozygous traits b. known to skip generations in males c. carried only by males and transmitted only to males d. carried only by females, but are never expressed e. passed on to only 50% of female progeny