Peas were a good organism of choice for Mendel because
A) he could study one trait at a time. B) they cannot self-fertilize.
C) they cannot cross-fertilize. D) the traits were difficult to visualize.
A
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The model organism for the study of plant development is _____
A. Drosophila melanogaster B. C. elegans C. Xenopus laevis D. Arabidopsis thaliana
The size of the amplified DNA fragment generated during PCR is determined by
A. how many cycles are performed. B. the size of the template DNA. C. the location to which the primers anneal. D. how much Taq is used.
States of consciousness are controlled by the
a. reticular formation. b. medulla. c. cerebellum. d. cerebral cortex. e. hypothalamus.
Which of the following photosynthetic pigments can be found at the photosystem reaction center?
A) chlorophyll b B) chlorophyll a C) a carotenoid