Use the following answers in the next 5 questions. Each question has only one co

Question

Use the following answers in the next 5 questions. Each question has only one correet but cach answer may be used more than once or not at all. a. auxins b. cytokinins c. gibbcrellins d. ethylene e. abscisic acid 28 stomata signals guard cells to close to prevent water loss out of the 29. When soils are flooded, a plant may produce adventitious roots. This often results from signaling by 30. Another response to flooded soils is the production of acrenchyma, signaled by the production of 31. When I try to ripen a bunch of pears in a brown paper bag 1 am assuming they are producing which will cause each other to ripen faster. 32. Dwarf mutant plants will usually grow tall if meristem. This same hormone is used by the food industry to most often create parthenocarpic fruit, such as seedless grapes. is applied to the shoot apical 33. Which of the following statements about tropic responses is FALSE? a. They are responses to an external stimulus. b. They are directional responses c. Responses involve bending or curving. d. Positive responses are away from the stimulus. 34. According to the original hypothesis on positive gravitropism of roots, auxin is redistributed to the side where it cell expansion. a. lower; stimulates c. upper; stimulates b. lower, inhibits d. upper, inhibits 35. When a growing root is oriented horizontally, the amyloplasts in the rootcap: b. float upward. d. do not move. a. slide downward. c. attach to the nuclear envelope. 36. Commercial growers of chrysanthemums (short-day plants) can delay flowering by a shon treatment a. dark; in the b light, in the middle of the night. middle of the day

Explanation / Answer

Answers -

28. - abscisic acid.

29. - Auxins.

30. - ethylene.

31. - ethylene.

32. - gibberellins.

33. - positive responses are away from the stimulus.

34. - lower ; stimulus.

35. - slide downward.

36. - dark ; in the middle of the day.

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