An emergency room physician has withdrawn blood from a vessel in your arm. The dark red color of the blood indicates that it was
A) on its way to the tissues of the arm.
B) going away from the heart.
C) coming from the lungs.
D) taken from a vein.
E) taken from an artery.
D
Biology & Microbiology
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Why does the eyecup of the flatworm only detect light and dark, not images?
A. There are too few photoreceptors. B. There is no lens. C. The eyecup is lined by a pigmented epithelium. D. Flatworms do not have a brain.
Biology & Microbiology
Blood pressure is highest in the:
a. arteries b. arterioles c. capillary bed d. venules e. veins
Biology & Microbiology
Noise louder than __________ decibels can damage
hearing. a. 10 b. 21 c. 90 d. 50 e. none of these
Biology & Microbiology
E. coli catabolizes lactose
What will be an ideal response?
Biology & Microbiology