Which postzygotic barrier do mules illustrate?
a. temporal isolation
b. hybrid inviability
c. hybrid breakdown
d. gametic isolation
e. hybrid sterility
e
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V. cholerae and Vibrio alginolyticus appear what color on TCBS agar?
a. Green b. Black c. Yellow d. Blue
A typical sponge is ____ because it produces ____
a. a hermaphrodite; only egg cells b. parthenogenetic; both egg and sperm cells c. a hermaphrodite; both egg and sperm cells d. parthenogenetic; only egg cells e. a hermaphrodite; only sperm cells
How many different types of amino acids can be used in the construction of proteins?
What will be an ideal response?
Tracers are elements that
a. are used in minute amounts in plants. b. can be monitored through biochemical reactions. c. must be inert. d. have an unbalanced electrical charge. e. must have a stable nucleus.