The process of diffusion requires:
A. a concentration gradient.
B. ATP energy.
C. the random movement of molecules.
D. transport proteins.
Answer Key: C
You might also like to view...
The biome with the most complex diversity of life forms is the:
a. tundra b. taiga c. tropical rain forest d. desert e. grassland
A population includes
a. all organisms of the same species in one place at a given moment. b. the organisms and their physical environment. c. the physical environment in which an organism exists. d. all organisms within the environment at a given moment.
In muscle innervation motor nerve fibers signal muscle movement from the region called the neuromuscular junction.
Answer the following statement true (T) or false (F)
What likely caused the slight increase of mean poison ivy biomass in the control plots?
A) random experimental error
B) an increase in atmospheric CO2 levels
C) There were more poison ivy plants in the control plots to begin with.