An example of an osmoconformer is:
a. a crab.
b. a polychaete worm.
c. a fish.
d. a sea squirt (tunicate).
D
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A pyrimidine or purine base that has been joined with a ribose or deoxyribose sugar moiety is now termed a ________.
Fill in the blank(s) with the appropriate word(s).
Which naturalist proposed that many species that once existed are now extinct?
a. Cuvier b. Lamarck c. Darwin d. Malthus e. Wallace
Members of which of the following groups can
be single-celled producers?
a. plantae b. protista c. bacteria d. bacteria and protista e. bacteria and plantae
Scientists have confirmed by carbon dating that seeds dormant for up to 2000 years can successfully germinate. Based on the requirements for germination, what research expedition should you join in order to retrieve some ancient but viable seeds?
A. A trip to Indonesia, where the civet cat eats and expels coffee beans, producing a gourmet coffee known as Kopi Luwak. B. A trip to the Irish marsh, where wet peat creates anaerobic conditions, and your colleagues hope to unearth a bog mummy. C. A trip to the arid Dead Sea region, where your historian colleagues have found a storeroom of wax-sealed jars. D. A trip to the Burgess Shale in Canada, where your paleontologist colleagues have found fossils from the Cambrian era.