1.Which of the following would be least likely to produce long-distance water and sugar transport (bulk flow) in plants?

a) negative pressure potential b) positive pressure potential c) transpiration d) diffusion assisted by aquaporins

2.All of the following are adaptations that help reduce water loss from a plant EXCEPT:

a) transpiration b) waxy coatings of the dermal tissue c) CAM photosynthesis d) thickened epidermis tissue

3.Which of the following is a source of nitrogen that is available to plants only if microbial activity “fixes” it (converts it to another form)?

a) ammonium (NH4+) b) nitrogen gas (N2) c) nitrate (NO3-) d) none of the above