The accumulating data from biogeography, comparative morphology, and fossil discoveries led early naturalists to
propose that species ____.
a. helped sculpt Earth's surface by foraging activities
b. are all evolutionarily related
c. had changed over time
d. never went extinct
e. were created in a perfect state
ANSWER: c
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The form of asexual reproduction used by a hydra is called __________. Fill in the blank(s) with the appropriate word(s)
By the mid-1980s, spring ozone thinning over Antarctica was so pronounced that people were referring to the lowestozone
region as a(n) __________. Fill in the blank(s) with the appropriate word(s).
Which of the following is not one of the things to watch for in a mole?
A. larger than 6 mm B. a solid color, usually brown C. asymmetry D. elevated above the skin surface E. irregular border
Four of the five outcomes listed below result when a
cell is placed in a hypertonic solution. Select the exception. a. wilting b. plasmolysis c. turgidity d. limpness e. shriveling