Multiple Choice
Scientists theorize that life began to form more than _____ years ago:
A) 8 billion
B) 3 ½ billion
C) 100 million
D) 50 million
Correct Answer:
Verified
Correct Answer:
Verified
Q15: Choose the most appropriate letter for each.<br>-directional
Q23: Each species occupies a _ that is
Q24: A cline is:<br>A)an asexually produced individual<br>B)a gradient<br>C)a
Q26: Speciation is usually initiated by:<br>A)mutation<br>B)nonrandom mating<br>C)allelic recombination<br>D)geographical
Q27: Create a hypothetical population and describe the
Q29: Reproductive isolation that results from incompatibility in
Q30: Matching Questions<br>match each term with its definition:<br>-sympatric
Q31: An example of a selective agent in
Q32: Sickle-cell anemia is caused by the presence
Q33: Preadaptation:<br>A)refers to the potential to adapt to