Of all of the invertebrate phyla, only members of the phylum ________ can fly
A) Cnidaria
B) Annelida
C) Arthropoda
D) Nematoda
E) Platyhelminthes
C
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Some cells may exit the cell cycle and enter a nondividing G0 state
Indicate whether the statement is true or false
On her first birthday, Alena takes her first steps, which are clumsy and awkward. By her second birthday, her steps are
smooth and coordinated. This transition in Alena’s walking skills best illustrates the concept of: a. imprinting. b. hard-wiring. c. reflex action. d. synaptic plasticity. e. voluntary acquisition.
The cell body of a motor neuron resides in the spinal cord, but it may control muscles a long distance away. In a giraffe, the ________ of a leg motor neuron may be six feet long!
A. soma B. axon C. node of Ranvier D. dendrite
Rapid inward diffusion of Na+ produces a dramatic change in membrane potential. What is this event called?
A. Depolarization B. Excitatory postsynaptic potential C. Saltatory conduction D. Monosynaptic reflex E. Hyperpolarization