Biofilm bacteria are beneficial in their
A) accumulation and attachment to damaged tissues in the human body.
B) involvement in nutrient exchange between microbes and plant roots.
C) invasive penetration of cooling towers and storage tanks.
D) accumulation on hard surfaces such as teeth.
Ans: B) involvement in nutrient exchange between microbes and plant roots.
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A. brain stem B. white matter C. sulci D. gray matter
Which fungi are responsible for infecting hundreds of plant species and cause the loss of millions of pounds of produce each year?
A. Tobacco mosaic virus B. Agrobacterium tumefaciens C. White and Grey mold fungus D. Cryphonectria parasitica, which also causes chestnut blight.
Which of the following has been found in
association with the K-T boundary layer?
a. iridium b. shocked quartz c. tektites d. all of these e. none of these
Which of the following is NOT a way to move materials across prokaryotic plasma membranes?
a) Endocytosis b) Simple diffusion c) Facilitated diffusion d) Osmosis