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
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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
__________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).
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.
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