The gene encoding the lac repressor is part of the lac operon
a. true
b. false
Ans: b. false
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A microbe growing in a refrigerator is likely
A) psychrophilic. B) mesophilic. C) psychrotolerant or psychrophilic. D) hyperthermophilic.
You have discovered a new organism that displays bilateral symmetry during its larval stage, radial symmetry as an adult, develops three germ layers during embryonic development, and forms a mouth opposite the blastopore. Which classification for this organism is most likely?
a. Ctenophora b. Placozoa c. Echinodermata d. Cnidaria
Which one of the following methods of enhancing fertility involves the placement of sperm and unfertilized eggs into the oviduct?
A) artificial insemination B) in vitro fertilization C) gamete intrafallopian transfer (GIFT) D) hysteroscopy E) zygote intrafallopian transfer (ZIFT)
Choose the letter of the best match from the following:A. birth control pillB. intrauterine deviceC. diaphragmD. foams and jelliesE. vasectomySurgical intervention.
Fill in the blank(s) with the appropriate word(s).