Relatives of modern ____ and horsetails were the dominant plants during the Carboniferous period
a. club mosses
b. peat mosses
c. ferns
d. liverworts
e. hornworts
ANSWER: a
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Which of the following are specialized cells that receive and transmit chemical and electrical signals?
a. glial cells b. dendritic cells c. neuron cells d. axon cells
Briefly explain the role of Malpighian tubules in arthropods. What will be an ideal response?
What event triggers the release of neurotransmitters?
a. Calcium induces the fusion of synaptic vesicles with the presynaptic membrane. b. Sodium induces the fusion of synaptic vesicles with the presynaptic membrane. c. Potassium induces the fusion of synaptic vesicles with the presynaptic membrane. d. Calcium activates enzymes that degrade synaptic vesicles. e. Sodium activates enzymes that degrade synaptic vesicles.
Children and adults have which respective total numbers of teeth?
A. Children: 16; Adults: 32 B. Children: 18; Adults: 30 C. Children: 20; Adults: 30 D. Children: 20; Adults: 32 E. Children: 22; Adults: 34