Complete reproductive isolation is evidence that what has occurred?
a. extinction
b. speciation
c. polyploidy
d. hybridization
e. gene flow
ANSWER: b
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Which of the species were probably herbivorous? On which test results did you base this conclusion?
a. species 1 and 4 because of the presence of starch b. species 2 and 4 because of the presence of protein and amino acids c. species 2 and 3 because of the presence of starch and low amino acids andprotein d. species 1 and 3 because of the presence of protein and amino acids
________ occurs when two species undergo reciprocal evolutionary change through natural selection
Fill in the blank(s) with correct word
Calcium is a mineral that plays an important role in ____.
A. producing thyroid hormone B. water balance C. intercellular signaling in muscles and nerves D. supporting the hemoglobin molecule E. maintaining the cell membrane
Sister chromatids are joined together at a pinched spot called the _______
Fill in the blank(s) with the appropriate word(s).