Phenotypic variation among individuals is not always visible and can include which one of the following trait characteristics?
A. developmental differences
B. physiological differences
C. behavioral differences
D. developmental and physiological
differences
E. developmental, physiological and
behavioral differences
E
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The colonization of land by animals:
A. preceded the presence of plant species on land. B. took place billions of years ago. C. was made more easy by high atmospheric levels of carbon dioxide. D. may have taken place independently by a variety of species descended from aquatic environments.
Cystic fibrosis is a recessive disorder. If a
couple, each of whom is heterozygous, have children, what is the probability that they will have a child with cystic fibrosis?
a. 0% b. 25% c. 50% d. 75% e. 100%
The outer portion of the kidneys is the ________, whereas the inner portion is the ________
Fill in the blank(s) with correct word
Which of the following is not a type of neuron?
A. motor B. sensory C. afferent D. interneuron E. neuroglia