The greatest rate of extinction of all time is/was probably caused by ____
a. an ice age
b. unknown reasons
c. formation of Pangea
d. human activity
e. asteroid impact
ANSWER: d
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A) selective but not differential B) differential but not selective C) both selective and differential D) neither selective nor differential
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Describe some key structural characteristic of epithelial tissue that contributes to its function
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A chromosome library is a collection of all of the DNA:a
that occurs in one species. b. contained in one chromosome. c. that would be found in the chromosomes of a typical cell of a particular organism. d. in a recombinant gene. e. that codes for functional enzymes in a chromosome of a particular organism