Most of the oxygen in the blood is transported by
a. plasma.
b. serum.
c. platelets.
d. hemoglobin.
e. leukocytes.
D
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Fatty acids, waxes and oils are classified in what category of biomolecules?
a. Carbohydrates b. Lipids c. Proteins d. Nucleic acids e. None of these choices.
All of the following traits are true of fibrous root systems except that they are not ________
a. adapted to take advantage of light rains b. typical of eudicots c. made up of both lateral and adventitious roots d. produced by grasses
The letter “A” in the above figure is
a. the epidermis. b. the sweat gland. c. the dermis. d. the hypodermis. e. none of the above.
A key derived character of sharks and rays that distinguishes them from ray-finned fishes is
A) jaws and a swim bladder. B) vertebrae. C) calcified (hard) bones. D) a skeleton made of cartilage