Mutations are the most important source of variety on which natural selection depends and operates. There are two forms of mutations,
A. both discovered by Mendel.
B. cancer-causing mutations and chromosomal rearrangement.
C. and both occur only during the development of an individual.
D. called base substitution mutation and chromosomal rearrangement.
E. and both always result in phenotypic change.
Answer: D
You might also like to view...
First-cousin marriage causes significant increases in genetic deficiency
a. True b. False Indicate whether the statement is true or false
Why do state authorities have a particularly unfavorable view of mobile pastoralists?
A) Their mobility makes them difficult to control. B) They have no wealth with which to pay taxes. C) Most pastoralists are fiercely territorial. D) Pastoralists use up too much land for their population size.
The most complete H. erectus specimen yet found was from:
a. ?Dmanisi. b. Trinil. c. ?Zhoukoudian. d. ?Nariokotome. e. ?Peking.
The two domesticated animals kept in North America before European contact were __________ and dogs
a. goats b. horses c. chickens d. turkeys