Choose a pair that correctly associates the mechanism for osmoregulation or nitrogen removal with the appropriate animal
A) metanephridium — flatworm
B) Malpighian tubule — frog
C) flame bulb — snake
D) exchange across the body surface — marine invertebrate
D
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A kilowatt, a unit of electrical power, is
(a) 10 watts. (b) 100 watts. (c) 1000 watts. (d) 1,000,000 watts.
Drops containing mainly __________ may spatter a
car parked under an aphid-infested tree. a. water b. sucrose c. starch d. cellulose e. honey
The mordant is applied after the primary dye in the Gram stain
a. true b. false
What is the difference between a tissue and an organ system?
A) An organ system includes tissues. B) Tissues are not composed of cells, but organ systems are composed of cells. C) Tissues are composed of organ systems. D) A tissue cannot exist unless it is part of an organ system, but an organ system can exist independently of tissues.