Some animals have evolved sexual maturity in juvenile body forms. This is called
a. allometric growth.
b. preadaptation.
c. paedomorphosis.
d. punctuated equilibrium.
e. anagenesis.
C
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Which layer of the digestive tract has secretory and absorptive functions?
A. lumen B. mucosa C. submucosa D. longitudinal muscles E. serosa
The process whereby repeated, short stimuli provided to a hippocampal neuron have the effect of strengthening the synapse it makes with other neurons is specifically referred to as
A. long-term potentiation. B. short-term potentiation. C. neurotransmission. D. synaptic reuptake. E. None of these choices are correct.
Answer the following questions true (T) or false (F)
1. Lazzaro Spallanzani was the first scientist to provide evidence disproving the spontaneous generation of microorganisms. 2. The smallest chemical units of matter are elements. 3. The side groups of amino acids can interact with each other and with other molecules.
The regulation of expression of the C. elegans gene lin14 by lin4 was one of the first known animal examples of
a. a gain-of-function mutation. b. nested genes. c. a riboswitch. d. an antisense gene. e. RNA interference.