Which cell type secretes a chemical message
for the purpose of cellular communication?
a. muscle
b. neuron
c. keratinocyte
d. fibroblast
e. platelet
B
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Although nitrogen can act as a fertilizer initially, too much nitrogen added to a forest system can cause forest decline
Indicate whether the statement is true or false
The theory illustrated by the accompanying figure is used to explain the origin of which organisms?
a. anaerobes
b. eukaryotes
c. prokaryotes
d. protobionts
e. vascular plants
Which of the following is true about pasteurization?
a. the technique was invented by Alexander Flemming b. it dramatically affects the color, texture, and taste of foods c. moderately high temp is applied, long enough to kill coxiella burnetii d. food is heated for a very long time to kill microbes
If a psychotic person's level of consciousness is fluctuating, you should:
A) administer 25 g of dextrose. B) immediately assess blood pressure. C) consider administering haloperidol. D) suspect an organic brain syndrome.