Which statement about mutations is not true? (Choose all that apply)
A. Mutations make evolution possible.
B. Mutations result in genetic variation among
individuals.
C. Mutations accumulate in a genome over
time.
D. Mutations are usually caused by exposure
to radiation.
E. Mutations can be harmful, beneficial or
neutral.
F. Mutations occur as a direct response to an
organism's attempt to change one of its traits.
D,F
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What is one way in which plant development differs from animal development?
A. Plants can develop only from somatic cells B. Plants lack morphogens C. Cell migration occurs in plants
Lack of vitamin ____ leads to rickets
a. a b. b c. c d. d e. e
Skin grafts between identical twins are more successful than grafts between more unrelated individuals. Why?
A. Identical twins share the same uterine environment. B. Twins are exactly matched in age. C. Identical twins have identical HLA alleles. D. Identical twins are the same sex. E. None of these is true.
DNA replication is ____.
A. redundant B. semiconservative C. progressive D. conservative E. repetitive