A short-day plant will flower only when _____
A) days are shorter than nights
B) days are shorter than a certain critical value
C) nights are shorter than days
D) days and nights are of equal length
Answer: B
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In which part of the chloroplasts are the Calvin cycle enzymes located?
A. stroma B. thylakoids C. grana D. envelope E. cristae
Charcot-Leyden crystals are often observed in specimens infected with which one of the following trematodes?
a. Clonorchis (Opisthorchis) sinensis b. Opisthorchis viverrini c. Fasciola hepatica d. Paragonimus westermani
The area labeled “A” is
a. a nucleus. b. chromatin. c. endoplasmic reticulum. d. a vacuole. e. a nucleolus.
The disinfectant of choice for municipal water supplies is ________.
A. chlorine B. ultraviolet light C. fluorine D. either fluorine or chlorine