What is the waxy substance suberin typically associated with?

a. root hairs
b. tonoplasts
c. endodermis
d. pericycle


Ans: c. endodermis

Biology & Microbiology

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Nematodes and rotifers have a body cavity that is

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Which type of meristem is only found in monocots?

a. apical b. lateral c. intercalary d. permanent

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What change(s) can have detrimental effects on the human food supply?

a. 10%–35% of all U.S. crops are lost to insect damage each year. b. $10 billion per year are spent on insecticides by American farmers. c. Natural selection can create an "arms race" between pest species that feed on crops and pesti-cides developed by humans. d. All of the above.

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Which of the following is true of the structure

labeled "A"? a. It is composed of tubulin subunits. b. It is composed of actin subunits. c. It is a microfilament. d. It is an intermediate filament. e. It is a major component of muscle cells

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