Once in the ocean, most of the available phosphorous ____
a. enters marine food webs
b. enters ocean plants
c. becomes ionized
d. precipitates out of solution
e. enters a gaseous phase
ANSWER: d
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Which of the following is not an accurate comparison of human and insect respiratory
systems?
a. The insect tracheal system provides a large surface, while the lungs have only a small surface-to-volume ratio. b. Oxygen is transported via the circulatory system in humans, but the tracheal system in insects is separate from body fluids. c. Only humans can increase airflow using ventilation. d. Both gas exchange systems consist of a system of tubules to transport gases.
Members of the phylum ____ are called acorn worms. They use their mucus-coated proboscis to
construct U-shaped burrows to trap food particles, and also trap food from water passed through gill slits in their pharynx.
a. Hemichordata b. Echinodermata c. Cnidaria d. Arthropoda e. Chordata
When geese or ducks are imprinted, this means that they ____
a. will return to the place they were born to breed and raise their own young b. have become habituated to harmless stimuli c. have been experimentally trained by operant conditioning d. learned the features of a suitable mate during a critical period e. have two nonfunctional copies of a particular gene
An indicator of programmed cell death is
a. fragmented chromatin. b. swelling of the membrane. c. cell lysis. d. loss of transcription control. e. All of the above