What is the significance of genetic variation?
a. It influences population interactions.
b. It interacts within the biosphere.
c. It is the raw material for sexual reproduction.
d. It is the most fundamental level of species classification.
e. It is the raw material for adaptation, speciation, and evolution.
ANSWER: e
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In plants, the ground tissue functions
a. to transport sugars. b. to transport dissolved minerals. c. to protect the cambium. d. to form the woody parts. e. to support the plant and store materials.
A plant embryo (young sporophyte) packaged with a food supply in a tough outer coat is a:
a. Gemmae b. Pollen grain c. Seed d. Sperm e. Fruit
Rabbits and rodents are the chief reservoirs of the causative agent of ________.
A. brucellosis B. plague C. Lyme disease D. tularemia E. mononucleosis
All of the following pertain to cephalosporins exceptÂ
A. greater resistance to beta-lactamases. B. newer generations have activity against gram negatives. C. many administered by injection not orally. D. they have a beta-lactam ring. E. they are synthetic drugs.