What type of transport is able to move against normal concentration gradients?

a. passive transport
b. diffusion
c. osmosis
d. dispersion
e. active transport


e

Environmental & Atmospheric Sciences

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Environmental & Atmospheric Sciences

What is Papua New Guinea's most valuable export?

a. clothing b. workers c. minerals d. cassava e. sugar

Environmental & Atmospheric Sciences

Which of the following is NOT a salt weathering mechanism

a. growth of crystals b. swelling of clay minerals c. thermal expansion of crystals d. adsorption of water by crystals

Environmental & Atmospheric Sciences

The competence of moving air is generally limited to rock fragment that are sand sized or smaller

a. True b. False Indicate whether the statement is true or false

Environmental & Atmospheric Sciences