During cell fractionation, the ____ cannot be isolated since it is destroyed when intact cells are lysed
a. lysosomes
b. mitochondria
c. plasma membrane
d. proteins
e. nucleic acids
ANSWER: c
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The age structure diagram for rapidly growing populations:
a. is in the form of an hour glass, with large young and old populations b. is characterized by a large percentage of the population in the postreproductive years c. has a small base showing a reduced number of young d. has about equal distribution between all age groups e. is in the form of a pyramid and has a very broad base showing a large number of young
The antidiuretic hormone
a. promotes processes that lead to an increase in the volume of urine. b. promotes processes that lead to a decrease in the volume of urine. c. acts on the proximal tubules of nephrons in the kidney. d. is produced by the adrenal cortex. e. fits all of these descriptions
When your mother is mad at you, she likes to remind you that she spent 48 hours in painful labor to bring you into the world! Specifically, she means that she spent a long time in the ________ stage of labor
A) expulsion B) dilation C) third trimester D) placental
In which of the following ways does species richness affect ecosystem function? (Check all that apply.)A) Low species richness can contribute to ecosystem stability.B) High species richness can increase ecosystem resistance to drought.C) Low species richness can make an ecosystem more susceptible to invasive species.D) High species richness reduces overall ecosystem productivity.
What will be an ideal response?