Mycorrhizae are ____

a. the small roots in the root systems of trees
b. endosymbiotic bacteria associated with plant roots
c. fungus and root mutualistic associations
d. parasitic fungal infections of tree roots
e. endosymbiotic fungal cells associated with leaves


ANSWER: c

Biology & Microbiology

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In the above illustration of fluid regulation in an earthworm, the letter "B" represents which of the following?

a. the excretory pore b. the nephridium c. the storage bladder d. the ureter e. funnel to collect fluid

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The Biological Species Concept:

a) is the best and most accurate species concept. b) states that species that live together will eventually start breeding. c) states that a species is any group which shares similar DNA. d) states that any organisms that are biologically similar constitute a species. e) defines a species as any group of actually or potentially interbreeding species that produce viable offspring

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The scientific name is derived from the genus and species to which an organism belongs.

a. true b. false

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