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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The is a cartilage flap that covers the larynx to prevent food entry during swallowing.
A. epiglottis B. glottis C. vocal cords D. pharynx E. esophagus
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Explain the meaning and utility of RNA interference
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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