According to the intermediate disturbance hypothesis, species richness is greatest in communities that experience
____.
a. rare moderate disturbances
b. high temperatures
c. frequent severe disturbances
d. frequent moderate disturbances
e. rare intense disturbances
ANSWER: d
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All of the following statements are true about restriction enzymes EXCEPT
A. hundreds of different ones have been isolated and purified. B. they are made by bacteria and viruses. C. each enzyme cuts DNA at a different specific base sequence. D. they produce single-stranded complementary ends that can join to two different DNA strands by complementary base-pairing.
The long-term average pattern of weather at local, regional, or global scales is referred to as ________
Fill in the blank(s) with correct word
Explain why the seed plants would have an advantage over the seedless plants within a community.
What will be an ideal response?
Which element is correctly matched with its major function in plants?
a. phosphorus?alters membrane permeability b. sulfur?essential part of chlorophyll c. potassium?opens and closes stomata d. carbon?maintains turgidity of cells e. calcium?involved in nitrogen-fixation