A simple reflex arc is made up of a sensory receptor and
(a) a sensory neuron.
(b) a motor neuron.
(c) an effector.
(d) all of the above.
(d) all of the above.
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What is the adaptive benefit that explains why some simple reflex circuits bypass the brain?
A. The response is slower. B. The response is faster. C. The response is more intense. D. The response is less intense. E. None of the choices is correct; there is a better explanation that is not listed.
Which type of plant hormone is primarily responsible for the bending of a plant shoot toward light?
a. auxins b. ethylene c. systemin d. salicylic acid e. brassinosteroids
Natural selection results in changes in ____.
A. individuals B. populations C. kingdoms D. phyla E. animals only
The outer main section of the kidney is the
What will be an ideal response?