Sequencing an entire genome, such as that of C. elegans, a nematode, is most important because _____
A) it allows researchers to use the sequence to build a "better" nematode, which is resistant to disease
B) it allows research on a group of organisms we do not usually care much about
C) a sequence that is found to have a particular function in the nematode is likely to have a closely related function in vertebrates
D) a sequence that is found to have no introns in the nematode genome is likely to have acquired the introns from higher organisms
C
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Which of the following characteristics of steroid hormone receptors are shared by both type I and type II receptors?
A. The receptor is always located in the nucleus. B. The receptor only binds to the response element when bound by hormone. C. The direct binding of hormone is required for transcriptional activation. D. All of the choices are correct.
The term that refers to the presence of a tuft of flagella emerging from a single site is ________.
A. amphitrichous B. atrichous C. lophotrichous D. peritrichous E. monotrichous
An individual that has two dominant alleles for a trait (AA) is __________. Fill in the blank(s) with the appropriate word(s)
The ultimate source of all energy in a
terrestrial ecosystem is a. the organic matter in all the organisms of the ecosystem. b. electrons from water molecules. c. sunlight. d. ATP. e. inorganic mineral ions in the soil.