Stomata close in response to_______ . a. ABA c. bacterial flagellin b. nitric oxide d. all of the above

The protective layer of cells found on leaf’s upper and lower surfaces is known as the __________.      Select one: a. chloroplast b. stomate c. Cutin d. epidermis e. none of the listed choices f. fiber sheath g. cuticle h. mesophyll

4. Plant roots are positively gravitropic; what does this mean?   a. They are positively attracted to soil. b. They grow toward the direction of gravity. c. They grow away from other plant roots. d. They grow in the opposite direction to sunlight.   5. Plant shoots are positively phototropic; what does this mean?   a. They grow toward a light stimulus. b. They grow toward other brightly colored plants. c. They grow away from bright sunlight. d. They reflect the majority of the wavelengths of light.   6. Which of the following is correct about plant roots?   a. Plant roots are positively phototropic and negatively gravitropic. b. Plant roots are negatively phototropic and positively gravitropic. c. Plant roots are positively hydrotropic and negatively gravitropic. d. Plant roots do not display any major tropisms.

The primary growth of a plant is due to the action of the ________. a. lateral meristem b. vascular cambium c. apical meristem d. cork cambium

All other factors being equal, tiny hairs near the stomata will _______ transpiration. All other factors being equal, an increase in wind speed will _______ transpiration. Select one: a. decrease, decrease b. increase, decrease c. increase, increase d. decrease, increase

What pathway(s) via which that ion could be taken by plant roots?_____________ A. Apoplast B. Symplast C. Symplast/Apoplast combined pathway D. Either of above E. A or B

Through mycorrhization, a plant obtains important nutrients such as ________. a. phosphorus, zinc, and copper b. phosphorus, zinc, and calcium c. nickel, calcium, and zinc d. all of the above