It is possible for a flowering plant to be
fertilized even though its ____ have been
removed.
a. stamens
b. stigmas
c. styles
d. ovaries
e. carpels
A
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Why is the fossil record not a complete catalog of biological history?
A. Not all organisms fossilize with equal probability. B. Fossilization destroys the structure of DNA. C. The process of fossilization often destroys anatomical features of the organisms being preserved. D. Fossils only preserve organisms for about 10 million years; older organisms are destroyed by geological processes. E. Only animals, not plants, are fossilized.
Which of the following models for RNA polymerase II transcription termination is analogous to ?-dependent termination in bacteria?
A. the antiterminator model B. the submarine model C. the torpedo model D. the allosteric model E. the hairpin model
RNA cannot be cloned directly. ________, a viral
enzyme, is used to convert single-stranded RNA into ___________for cloning. Fill in the blank(s) with the appropriate word(s).
The part of the brain that deals with the basic drives
such as hunger, sex, and thirst is the a. cerebrum. b. pons. c. cerebellum. d. thalamus. e. hypothalamus.