One explanation for new species is that they emerge when two populations from an original species become geographically separate. With respect to this explanation, contemporary research has shown that
a. geographically isolating a species brings about its extinction.
b. it is not possible to geographically isolate members of a species from one another.
c. there are many examples of new species that have emerged without geographic isolation.
d. new species never have ancestors in common with original species.
Answer: c. there are many examples of new species that have emerged without geographic isolation.
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Which of the following is NOT one of the criteria for deciding when to end therapy?
a. When your difficulties no longer interfere with work and personal activities. b. When all your difficulties have been resolved. c. When you can maintain the gains made in therapy on your own. d. When the crisis or problem that brought you to therapy is under control.
Testing participants before and after an experimental manipulation is called a(n) __________ design
Fill in the blanks with correct word