In a chemical analysis of an animal tissue sample, which element would be in the least quantity?
A. carbon
B. oxygen
C. hydrogen
D. nitrogen
E. iodine
E
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Ligers, the offspring from the mating of a lion and a tiger, are sterile. This is an example of
(A) geographic isolation. (B) hybrid infertility. (C) gametic incompatibility. (D) mechanical incompatibility. (E) behavioral isolation
Antibody-mediated immune responses produced by specific proteins are generated by:
a. lymphocytes of the T class. b. lymphocytes of the B class. c. neutrophils. d. basophils.
What is often true of the fruits eaten by birds and mammals?
A. They are pale colored with strong odors. B. They contain a large number of parasites. C. They mimic the shape of insects. D. They are brightly colored.
A halophile would grow best in ________.
A. arid, desert soil B. fresh water ponds C. hot geyser springs D. salt lakes E. acid pools