Because ____ character states are shared by the ingroup and the outgroup, phylogenetic trees are constructed by
cladistic analyses that group species that share only ____ character states.
a. derived; derived
b. nongenetic; genetic
c. derived; ancestral
d. ancestral; genetic
e. ancestral; derived
ANSWER: e
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What reaction is catalyzed by mercuric reductase?
A) CH3HgCH3 to Hg2+ B) CH3Hg+ to Hg2+ C) Hg4+ to Hg2+ D) Hg2+ to Hg0
One of the limiting factors in engineering plants for nitrogen fixation is to prevent the binding of ________ to the enzyme nitrogenase and the subsequent inhibition of the enzyme.
A. calcium B. bacteria C. oxygen D. phosphorus E. cell membranes
A chicken has 78 chromosomes. A chicken cell will contain _____ chromosomes at the beginning of prophase and
_____ chromosomes after mitotic division is complete.
a. 78; 39 b. 78; 78 c. 39; 78 d. 156; 78 e. 78; 156
Predict what would occur if the amount of sodium suddenly increases in the blood.
A. Blood aldosterone levels would decline. B. Blood osmolarity would increase. C. Blood antidiuretic hormone would decline. D. Both blood osmolarity would increase and aldosterone levels would decline. E. Both blood osmolarity would increase and antidiuretic hormone levels would decline.