The statoliths of a lobster are replaced with iron filings, and a strong magnetic field is produced at the top of its tank. How will the lobster respond?
A. It will turn upside down and remain at the bottom of the tank.
B. It will continuously spin in circles.
C. It will not respond in any way.
D. It will turn upside down and grip the underside of the tank lid.
E. Its dorsal surface will stick to the top of the tank and it will be unable to move.
Answer: D
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If all the individuals in the threatened population die, this would be described as __________
a. extinction b. local extinction c. mass extinction d. adaptation
What is the correct order of these mitotic events?
A Chromosomes align on the midplate of the cell. B Kinetochores begin attaching to spindle fibers. C Nuclear membrane reforms and chromosomes decondense. D Chromosomes condense and centrosomes migrate to opposite sides of nucleus. E Sister chromatids separate and move to opposite poles. A) BDACE B) DABEC C) DBAEC D) ABDCE E) EDBAC
Two species of closely related squirrels both
feed on acorns produced by oak trees. One species feed exclusively near the top of the tree and the other feeds exclusively towards the bottom of the tree. This is an example of
a. competitive exclusion. b. resource partitioning. c. mutualism. d. commensalism. e. mimicry.
Captive breeding
A) has allowed for the reintroduction of many species to areas from which they had disappeared. B) does not require an understanding of the behavior and ecological niche of the target species. C) can work for animals but is generally not used for endangered plants. D) is the main conservation technique used to try to save endangered species from extinction.