Which of the following tropisms is the response to touch in plants?
a. gravitropism
b. phototropism
c. thigmotropism
d. mechanotropis
e. chemotropism
ANSWER: c
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Describe the evolution of the vertebrate heart.
What will be an ideal response?
What did Charles Darwin propose after observing the 11-inch-long nectaries of the Angraecum sesquipedale orchid in Madagascar?
A. that the orchid was an evolutionary dead end and could no longer reproduce B. the existence of a pollinator moth with a proboscis of 10–11 inches C. the presence of very small bees that can fit into a long nectar tube D. that the orchid must reproduce asexually E. that the orchid was a self-pollinator and required no assistance from an organism
The role of ATP in the sodium-potassium pump is to:
a. transfer NA+ to the inside of a cell. b. assist a NA+ to bind to a carbohydrate. c. transfer NA+ to the outside of a cell. d. assist a cell to release NA+ by exocytosis. e. assist a cell to take up NA+ by endocytosis.
Why is color blindness more common in males? What will be an ideal response?