Antibiotics
A. cause mutations to occur.
B. may act as alkylating mutagens.
C.
provide an environment in which preexisting mutants survive.
D. increase the rate of spontaneous mutation.
C
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In the experiments with moss patches described in your text, what were the two factors that affected insect extinction rates within patches?
What will be an ideal response?
Young multicelled organisms usually start out small, then grow in size and increase in complexity. This process is called
a. reproduction. b. heredity. c. development. d. evolution. e. metabolism.
All of the following statements concerning the evolutionary species concept are true EXCEPT
A. an evolutionary "family tree" is used to identify species based on a common ancestor. B. it relies on identification of certain morphological traits to distinguish one species from another. C. abrupt changes in traits are indicative of the evolution of a new species in the fossil record. D. it requires that the members of a species share a distinct evolutionary pathway.
Which of the following undergoes meiosis during the development of pollen grains?
A) Megaspore B) Generative nucleus C) Microspore D) Microspore mother cell E) Megaspore mother cell