The ____ of the eye is a tissue that is densely packed with photoreceptors. In the above diagram of the eye, which
letter identifies it?
a. lens; A
b. vitreous body; C
c. retina; C
d. sclera; A
e. cornea; D
ANSWER: c
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Leukocytes (white blood cells) account for about _______ of the cells in human blood.
A. 60% B. 10% C. 0.1% D. 1%
Which of the following dominates the process of
transcription? a. RNA polymerase b. DNA polymerase c. phenylketonuria d. transfer RNA e. all of these
What is the genetic basis that causes the symptoms of Down Syndrome?
What will be an ideal response?
Which of the following describe the typical lifecycle of amebiasis?
A) host makes contact with contaminated object; swallows cysts; trophozoites released from cysts in digestive tract; trophozoites travel to and reproduce in the liver; trophozoites travel to the lungs, trophozoites form cysts, cysts are coughed up, swallowed, and released from host in feces B) host makes contact with contaminated object; swallows cysts; trophozoites released from cysts; trophozoites reproduce in digestive tract; trophozoites travel to the lungs, trophozoites form cysts, cysts are coughed up, swallowed, and released from host in feces C) host makes contact with contaminated object; swallows cysts; trophozoites released from cysts; trophozoites reproduce in digestive tract; trophozoites travel to the lungs, trophozoites form cysts, cysts are coughed up and released from host in relatively large respiratory droplets that people sneeze, cough, drip, or exhale D) host makes contact with contaminated object; swallows cysts; trophozoites released from cysts; trophozoites reproduce in digestive tract; trophozoites and new cysts are released from host in feces E) host is bitten; cysts enter the bloodstream; trophozoites released from cysts in blood; trophozoites travel to and reproduce in the liver; new trophozoites circulate in blood, trophozoites are eaten by a new insect where they then form cysts