Which of the following is not a function of a plant's root system?

A. energy production
B. anchoring the plant
C. nutrient absorption.
D. water absorption
E. a site for beneficial relationships with fungi


A. energy production

Biology & Microbiology

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What role does wind play in desertification?

a. Wind disperses seeds. b. Wind blows away topsoil. c. Wind impedes grass growth. d. Wind damages mature grasses of grasslands. e. Wind causes drought.

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Why is an antigenic shift in a virus so dangerous?

A. It alters the virus in such a way that our immune system doesn't know how to combat it. B. It combines the deadliest features of another virus into its genetic makeup. C. The disease mutates into an entirely new form. D. It weakens our immune system.

Biology & Microbiology

Which of these substances are most important in the establishment of biofilms?

A) hemolysins B) invasins C) adhesins D) exotoxins E) siderophores

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Clostridium botulinum is a strict anaerobe; that is, it is killed by the molecular oxygen (O2) present in air. Humans can die of botulism from eating foods in which C. botulinum is growing

How does this bacterium survive on plants picked for human consumption? Why are home-canned foods, as opposed to store bought cans, most often the source of botulism?

Biology & Microbiology