Which group of plants was the first to produce seeds?
A) Bryophytes
B) Gymnosperms
C) Lycophytes
D) Angiosperms
E) Chlorophytes
B
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Which of the following, if used as a fertilizer, would be most immediately available for plant uptake?
A) NH3 B) N2 C) CN2H2 D) NO3- E) amino acids
Without fully functional p53, which checkpoint is compromised?
a. M b. S c. G1 d. G2
Synaptic integration means that
a. positive or excitatory stimuli produce an excitatory postsynaptic potential. b. the positive and negative ions neutralize each other. c. excitatory and inhibitory signals are summed in a receiving neuron. d. the adjacent neurons interact so that excitatory and inhibitory stimuli cancel each other out. e. all of these occur
The force of the original vibrations entering the ear is amplified by the
a. organ of Corti. b. oval window. c. round window. d. Eustachian tube. e. semicircular canals.