Although birds and mammals descended from different ancestors, they both have a four-chambered heart. This is the result of
A) the simplification of the cardiovascular system.
B) the necessity for rapid movement of blood.
C) convergent evolution.
D) genetic aberrations that resulted from mistakes in somatic cell division.
Answer: C
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A) highly perishable B) semiperishable C) nonperishable D) selectively perishable
Archibald Garrod called genetic disorders of biochemical pathways ____________________
Fill in the blank(s) with correct word
Which of the following is TRUE about water?
a. The oxygen end is slightly electropositive. b. Hydrogen bonds hold water molecules together. c. Water covers about one-half of the surface of the earth. d. Hydrophobic interactions attract water molecules. e. Solvent properties are greatest with nonpolar molecules
Which of the following is the best measure of an organism's fitness?
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