A pollen grain coat is composed of which of the

following?
a. sporopollenin
b. cellulose
c. peptidoglycan
d. exopolysaccharides
e. none of these


Answer: a

Biology & Microbiology

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What will be an ideal response?

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All of the following participate in apoptosis except

A) caspases. B) death signals. C) mitochondria. D) Bcl-2. E) APC ubiquitin ligase activity.

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Even though they were developed over 100 years ago, Koch's postulates can be used to study all infectious diseases of humans.

a. true b. false

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