At the endodermis is a thin band of hydrophobic material that prevents water passage between cells called the:
A. Casparian strip.
B. cortex.
C. medulla.
D. plasmodesmata.
E. parenchyma.
A
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Cheetahs are specialized hunters that stalk Thompson gazelles. This is an example of a ________ relationship.
A. commensalism B. mutualistic C. parasitic D. predator-prey
The chancre of syphilis
A. is very painful. B. develops into a lesion with firm margins and an ulcerated central crater. C. occurs due to small hemorrhaging of capillaries. D. occurs during the tertiary stage.
Disturbances in sensory neurons will result in an action potential if the
a. stimulus is graded. b. stimulus remains local. c. graded stimulus reaches a trigger zone. d. localized stimuli do not spread far. e. stimuli become downgraded to localized ones.
If the following are placed in the order of occurrence, which would be the third step?
a. diapedesis b. digestion c. formation of a phagosome d. formation of a phagolysosome