Four of the following statements about mycorrhizae are true. Which one is the exception?

a. They benefit plant growth.
b. They are an example of mutualism.
c. They provide nutrients to their plant partner through photosynthesis.
d. They increase the root surface area for absorption.
e. They receive sugars from their plant partners.


ANSWER: c

Biology & Microbiology

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In a muscle contraction, calcium ____

a. causes the hydrolysis of ATP b. connects actin with myosin to form a cross-bridge c. allows myosin to bind to actin d. catalyzes the formation of ATP from ADP and Pi e. causes the release of Pi from the myosin head

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An electrically charged molecule or atom is a(n) ________

Fill in the blank(s) with correct word

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Cells surrounded by plasma membranes and no cell wall need to maintain a certain cell volume because an influx of water would cause the cell to explode

In order to reduce cell volume, these cells increase the activity of their sodium-potassium pumps. Indicate whether the statement is true or false

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Media that contain a full complement of nutrient substances, including amino acids, and other

chemicals that normal strains use for themselves, is called:

a. agar media. b. minimal medium. c. nutritious media. d. complete medium. e. rich media.

Biology & Microbiology