A small wooded area was cleared for a new building, but then the builders went bankrupt. Over the ensuing years, plants and animals moved back into the plot in a process called ________
A) biological magnification B) secondary succession
C) primary succession D) climax community
Answer: B
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A woman is growing an African violet on her windowsill. After several weeks, she notices that the plant is leaning toward the right, in the direction of the window. In the stem(s) of her African violet, where would you expect to find most of the auxin?
A. on the left (shaded) sides of the stems, facing away from the window B. on the right (lit) sides of the stems, facing toward the window C. Auxin will be equally distributed between the right and left sides of the stems. D. Gibberellic acidâ€"not auxinâ€"will be in the stems of the African violet.
The oldest microfossils are of
A. prokaryotes. B. eukaryotes. C. insects. D. pollen grains. E. small animals.
After the publication of On the Origin of
Species, the idea of evolution was generally accept. What part of Darwin’s theory of evolution, however, was fiercely debated?
a. natural selection b. environmental change c. gradual change d. the old age of the Earth e. limited resources
Dr. Howard asks a group of men to identify themselves by their gender before giving them a test of heroism. What concept is Dr. Howard demonstrating?