The zenk gene in the finch brain is activated by tactile stimuli
Indicate whether the statement is true or false.
ANS: F, acoustical
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Shewanella spp. show great metabolic flexibility and can use a variety of electron acceptors, including ________.
A. chromium and tellurite B. technetium and neptunium C. uranium and plutonium D. iodate and selnite
Four of the five answers listed below are
caused by recessive genes. Select the EXCEPTION.
a. achondroplasia. b. phenylketonuria. c. Tay-Sachs. d. hemophilia e. Duchenne muscular dystrophy
The structure that covers the opening to the trachea during swallowing, thereby preventing food from entering the air passageway, is the
A. epiglottis. B. cecum. C. rumen. D. uvula. E. soft palate.
Natural selection ________.
A. prepares organisms for future changes in the environment B. results in evolutionary adaptation C. is a very rare phenomenon D. does not affect allelic frequencies