The process by which cells acquire specialized forms and functions is called
A. cell growth.
B. cell elasticity.
C. cell differentiation.
D. cell replication.
E. None of the choices are correct.
C. cell differentiation.
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We can conclude that natural selection must have acted in favor of large brains in humans because:
A. we have large brains in proportion to our body size compared to other mammals. B. large brains have allowed us to dominate the planet. C. large brains are metabolically expensive to produce and maintain. D. we would not have large brains if natural selection did not favor them. E. None of the answer options are correct.
Your parents are both heterozygous for the recessive disorder phenylketonuria (PKU). What is the probability that you
will have the disorder?
a. 25% b. 50% c. 75%
d. 100% e. 25% if your three siblings are healthy; 75% if your siblings also have the disorder
Which group of adult tissues is derived from the mesoderm?
a. lining of the digestive tract, liver, pancreas b. muscles, bones, cartilage c. skin, brain, retina d. skin, liver, pancreas e. lining of respiratory tract, thyroid gland, urinary bladder
The fourteen species of finch native to the Galapagos Islands
a. were victims of a mass extinction there b. evolved from a single common ancestor c. migrated in waves from South America d. evolved after a mass extinction of birds that previously lived in the islands e. were victims of a mass extinction there