Inside the penis, there are ____ cylinders of spongy tissue
a. one
b. two
c. three
d. four
e. five
ANSWER: c
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According to the cohesion-tension mechanism of water transport, cohesion occurs because
a. waxy coatings on insides of xylem keep water molecules together in the xylem. b. evaporation removes water from the leaves. c. water molecules tend to form hydrogen bonds with each other. d. water is pushed into the xylem by bulk flow. e. water is pushed into the xylem by phloem pressure.
The trachea and upper bronchial tree are similar in that both are held open by cartilaginous rings.
Answer the following statement true (T) or false (F)
Which of the following genes are not expressed in abundance during lysogenic growth phase of bacteriophage ??
A. cI B. int C. cro D. cII
In which of the following cellular organelles
does photosynthesis take place?
a. rough endoplasmic reticula b. Golgi bodies c. mitochondria d. chloroplasts e. more than one of these organelles is responsible for photosynthesis