In The Origin of Species by Natural Selection, ____ proposed that natural mechanisms produce and
transform the diversity of life on Earth.
a. Alfred Russel Wallace
b. Charles Lyell
c. Charles Darwin
d. Joseph Hooker
e. Charles Darwin and Alfred Russel Wallace
C
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. Which of the following are characterized by
radially symmetrical members?
a. annelids b. arthropods c. cnidarians d. roundworms e. flatworms
Ionizing radiation
a. breaks apart chromosomes. b. alters genes. c. extends the length of the DNA molecules. d. links DNA molecules together. e. both breaks apart chromosomes and alters genes.
Inactivated X chromosomes form dark spots in the nuclei of stained cells known as ________
Fill in the blank with correct word.
Which of the following is a characteristic by which viruses are classified?
A. type of nucleic acid B. type of life cycle C. number of chromosomes D. type of host E. size