A typical Euglena cell is elongated and bounded by a ________.
A. cytoproct
B. protuberance
C. plasmalemma
D. pellicle
Answer: C
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Most of the carbon dioxide in the blood of humans is transported
A. as dissolved CO2 in plasma. B. as bicarbonate ion in plasma. C. attached to hemoglobin in red blood cells. D. attached to hemoglobin in plasma. E. as carbonic acid.
Detritivores are
a. bacteria. b. plants. c. fungi. d. animals. e. more than one of these
Interbreeding two different species of lovebirds produces offspring that are unable to build a nest after they mature because they lack the appropriate nest-building behavior needed to build a nest
This limits genetic mixing between the species due to A) behavioral isolation. B) mechanical incompatibility. C) geographic isolation. D) hybrid inviability. E) ecological isolation.
Muscle that is not exercised will turn into fat.
a. true b. false