Molecules move from an area of low concentration to an area of high concentration during 

A. osmosis.
B. facilitated diffusion.
C. diffusion.
D. active transport.


D. active transport.

Biology & Microbiology

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Hemagglutination is

A. the clumping together of red blood cells in the presence of a viral suspension. B. the clumping together of infected cells in the presence of a viral suspension. C. the binding of iron in the process of a viral suspension. D. None of the choices are correct.

Biology & Microbiology

The rbcL gene, which has been useful in evolutionary studies in plants, is located in ____

a. mitochondrial DNA b. chloroplast DNA c. nuclear DNA d. mitochondrial and chloroplast DNA e. chloroplast and nuclear DNA

Biology & Microbiology

The major reservoir of phosphorus is ____

a. sedimentary rock b. plant material c. groundwater d. the atmosphere e. ocean water

Biology & Microbiology

What do autotrophs require in order to produce food for themselves and all the heterotrophs?

A. an energy source, inorganic nutrients B. an energy source, water C. sunlight, inorganic nutrients D. heat, water E. sunlight, organic nutrients

Biology & Microbiology