One reason certain plants grow well as houseplants is because they may be adapted to:

A. dry growing conditions
B. areas that normally lack direct sunlight
C. areas that get very little mineral content in the soils
D. growing short branches
E. lack of temperature changes


B. areas that normally lack direct sunlight

Biology & Microbiology

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Adaptive immunity refers to the type of specific immunity that

A. develops after exposure to antigen. B. can be induced by natural or artificial means. C. can result from transfer of antibodies from one individual to another. D. All of the choices are correct.

Biology & Microbiology

Its defoliant effects were first noticed when it leaked from gas lights; later found to be produced by plants themselves.  

Choose the letter of the best match: A. abscisic acid B. auxin C. ethylene D. cytokinin E. gibberellin

Biology & Microbiology

Light touch is detected by

a. Pacinian corpuscles. b. Meissner's corpuscles. c. Merkel's discs. d. Ruffini endings. e. free nerve endings.

Biology & Microbiology

Why should pregnant women and small children avoid certain fish?

A. PCB contamination B. lead contamination C. mercury contamination D. pesticide contamination E. herbicide contamination

Biology & Microbiology