Which of the following is NOT included in connective tissues?
a. bone
b. skeletal muscle
c. cartilage
d. collagen
e. blood
B
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The ____ are air-filled respiratory system structures common in insects
a. gills b. tracheal tubes c. lungs d. integumentary surfaces e. air sacs
In order for a cell to become cancerous, oncogenes must be , or tumor suppressors are .
A. inactivated; inactivated B. activated; inactivated C. activated; activated D. inactivated; activated E. suppressed; inactivated
A tariff is a
a. tax on exports. b. penalty imposed on exporters who export a greater quantity than the quota allows. c. penalty imposed on importers who import a greater quantity than the quota allows. d. tax on imports.
Scientists supporting phyletic gradualism explain any period of stasis in the fossil record as stabilizing
selection. ___________ Indicate whether the statement is true or false.