Mycorrhizal association with plant roots is best described as:

A. detrimental to the roots
B. only a temporary association dependent on water uptake
C. a symbiotic relationship between the plant and certain bacteria
D. a fungus root interrelationship
E. a kind of fungal parasite on plant roots


D. a fungus root interrelationship

Biology & Microbiology

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In a search for new antibiotics, a previously unknown organism has been recovered from the soil. It is nonmotile and is composed of long threadlike structures formed from nucleated cells. It is not-photosynthetic and absorbs its nutrients. This organism will most likely be classified among the

A. Eukaryotes (Fungi) B. Archaea C. Eukaryotes (Algae) D. Eukaryotes (Protozoa) E. Bacteria

Biology & Microbiology

__________are multiple copies of a short DNA

sequence that follow one another along a chromosome. Fill in the blank(s) with the appropriate word(s).

Biology & Microbiology

If you were able to look very closely at a portion of DNA and find methylated histones, you would

A. be looking at a region of inactive chromatin. B. be mistaken since only DNA can be methylated, not histones. C. be looking at a chromatin remodeling complex. D. be looking at a region of active chromatin.

Biology & Microbiology

Which of the following produce organic acids that may contribute to weathering of rocks?

A. arctic plants B. mosses C. aerial plants D. water plants E. lichens

Biology & Microbiology