____ is a large, double-stranded, helical molecule that contains instructions for assembling a living
organism from simpler molecules.
a. RNA
b. DNA
c. ATP
d. NADPH
e. Protein
B
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The situation in which an embryo produced as
a result of a mating between individuals of different species is incompatible with the mother and is subsequently aborted is an example of a. temporal isolation. b. hybrid inviability. c. mechanical isolation. d. gametic mortality. e. behavioral isolation
Which of the following drugs blocks the assembly of actin filaments?
a. Colchicine b. Cytochalasin c. Phalloidin d. Taxol e. Both b and c
The first surgical anticeptic to be used was
A. iodine B. ethanol C. phenol D. none of these choices
Which of the following types of mutations could result in a frameshift mutation?
A. either an insertion or a deletion of a base B. a base insertion only C. a base deletion only D. deletion of three consecutive bases E. a base substitution only