Nearsightedness is caused by a(n) _____
a. eye structure that focuses an image in front of the retina
b. eye structure that focuses an image behind the retina
c. eyeball that is too short
d. recessive trait on the Y chromosome
e. recessive trait on the X chromosome
ANSWER: a
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Succession results from all of the following EXCEPT ____
a. facilitation b. growth and maturation rates c. inhibition d. interspecific differences in dispersal e. stasis
The collarbone is the
a. tibia. b. patella. c. scapula. d. clavicle. e. tarsal.
Aging may be attributed to
a. genetics. b. free radical damage. c. a decline in DNA repair mechanisms. d. changes in structural proteins. e. all of these.
Which of these are primary lymphatic organs (organs in which blood cells are produced or mature)?
A) lymph nodes B) tonsils C) RED BONE MARROW D) THYMUS GLAND E) spleen