Head lice are a common pest. How long can they live away from a human host?
a. Only a short time
b. Several days
c. Several weeks
d. Up to one year if they are warm
Ans: a. Only a short time
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The graph below shows the rate of transport for each substance when the cells are placed in 0.10 mM solutions of A, B, and C. Based on these data and coupled with the data observed above, substance C is transported via ________.
A) active transport
B) facilitated transport
C) passive transport
D) simple diffusion
E) choices A, B, and C
Which protistan structure is NOT correctly matched with its function?
A. cyst-a reproductive structure B. pseudopodia-movement and feeding C. pyrenoid-synthesis of starch D. trichocyst-defense and capture of prey
Your lab instructor hands you a root slide and asks you to show her a cell with condensed chromosomes arranged in a straight line. In which section of the root would you begin your search?
A. It doesn't matter; all zones have the same level of mitotic activity. B. Zone of cell division C. Zone of maturation D. Root cap E. Zone of elongation
In dividing cells, most of the cell's growth occurs during _______.
Fill in the blank(s) with the appropriate word(s).