The type of plant hormone primarily responsible for inhibiting growth of lateral meristems on shoots and restricting
the formation of branches is/are ____.
a. abscisic acid
b. cytokinins
c. auxins
d. salicylic acid
e. gibberellins
ANSWER: c
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Which of the following events would NOT be expected to occur during a strong El Niño year?
a. heavy rains in the central and eastern Pacific ocean b. upwelling of cold water along the west coast of the Americas c. death of phytoplankton in western coastal areas d. warm surface currents flowing from west to east e. weakened equatorial winds
The seed plants became dominant in the late ___ when the climate became ___.
a. Cambrian---wetter b. Carboniferous---drier c. Carboniferous--wetter d. Cretaceous---drier e. Cretaceous---wetter
What percentage of the nervous system is made up of neuroglia?
a. twenty b. fifty c. sixty d. seventy five e. ninety
Identify the hydrogen ion concentration that represents the lowest pH from the following list:a
1 ? 10?3 b. 1 ? 10?4 c. 1 ? 10?7 d. 1 ? 10?11 e. 1 ? 10?14