CAMPBELL BIOLOGY:CONCEPTS... >CUSTOM<
18th Edition
ISBN: 9781323753149
Author: SIMON
Publisher: PEARSON C
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Textbook Question
Chapter 33, Problem 4TYK
In autumn, the amount of _____ increases and the amount of _____ decreases in fruits and leaf stalks, causing a plant to drop fruit and leaves.
a. ethylene Á auxin
b. gibberellin Á abscisic acid
c. cytokinin Á abscisic acid
d. auxin Á ethylene
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Root cells exhibit positive gravitropism with the help ofa. auxin in the root cells.b. amyloplasts in root cells.c. exposure to sunlight.d. a nearby substrate.
Auxin causes the bending of shoot toward light by?A. Causing cells to shrink on the dark side of the shootB. Causing cells to shrink on the lighted side of the shootC. Inhibiting growth on the dark side of the shootD. Stimulating growth on the lighted side of the shootE. Stimulating growth on the dark side of the shoot
Which of the given plant hormone will be more abundant in dormant buds and seeds?
a.Gibberellin
b.ABA
c.Ethylene
d.Auxin
Chapter 33 Solutions
CAMPBELL BIOLOGY:CONCEPTS... >CUSTOM<
Ch. 33 - Test your knowledge of the five major classes of...Ch. 33 - Prob. 2TYKCh. 33 - Prob. 3TYKCh. 33 - In autumn, the amount of _____ increases and the...Ch. 33 - Prob. 5TYKCh. 33 - Prob. 6TYKCh. 33 - Which of the following is a type of defense used...Ch. 33 - Prob. 8TYKCh. 33 - Prob. 9TYKCh. 33 - Prob. 10TYK
Ch. 33 - Prob. 11TYKCh. 33 - Prob. 12TYKCh. 33 - Prob. 13TYKCh. 33 - Prob. 14TYKCh. 33 - A certain short-day plant flowers only when days...Ch. 33 - If apples are to be stored for long periods, it is...Ch. 33 - Prob. 17TYKCh. 33 - A plant nursery manager tells the new night...Ch. 33 - A plant biologist observed a peculiar pattern when...Ch. 33 - Imagine the following scenario: A plant biologist...Ch. 33 - Prob. 21TYK
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- The stress hormone that helps plants respond to drought is (a) auxin (b) gibberellin (c) cytokinin (d) ethylene (e) abscisic acidarrow_forwardThe hormone that helps plants respond to drought is (A) auxin. (B) abscisic acid. (C) cytokinin. (D) ethylene.arrow_forwardWhich combination of hormones is best for promotingthe formation of lateral roots from pericycle?a. A high auxin level and low cytokinin levelb. A low auxin level and high cytokinin levelc. A high level of auxin and cytokininarrow_forward
- Which of the following may stimulate the growth of the roots in plant cuttings? Select one: a. The use of auxins. b. A decrease in soil minerals. c. A decrease in enzymes. d. The use of endocrine secretions.arrow_forwardKnowledge of photoperiodism can be helpful for (a) Laying out orchards in a particular area (b) Flower growers to regulate flowering as per demand (c) Farmers to shorten the period between germination and flowering a.a only b.b only c.a and b d.a and carrow_forward______is the hormone in most rooting compounds. a. Gibberellin c. Cytokinin b. Auxin d. ABAarrow_forward
- . Charles and Francis Darwin discovered that(A) auxin is responsible for phototropic curvature.(B) red light is most effective in shoot phototropism.(C) light destroys auxin.(D) light is perceived by the tips of coleoptiles.arrow_forwardPruning plants can promote lateral stems and increased plant biomass by _____________. Select one: a. suppressing cytokinin transport b. suppressing auxin transport c. promoting cytokinin transport d. promoting auxin transportarrow_forwardWhich of the following is True?a. Ethylene stimulates abscission layers to form.b. Abscisic acid causes abscission layers to form.c. Ethylene is sometimes sprayed on flowers to keep them fresh.d. Abscisic acid stimulates seed germination.arrow_forward
- A colour change in the fruit and an increase in its sweetness is due to a. the plant hormone ethylene b. keeping the fruit in the sun c. picking the fruit off the plant early d. spraying the fruit with abscisic acid e. keeping the fruit in the coldarrow_forwardWhich of the following statements is false?a. Auxin and gibberellin promote stem elongation.b. Cytokinin triggers growth of lateral buds.c. Abscisic acid promotes water loss and dormancy.d. Ethylene promotes fruit ripening and abscissionarrow_forwardIdentify the wrong match a.Senescence —Both auxin and ABA promote it b.Apical dominance — Auxin induces and Cytokinin counteracts c.Dormancy — Both ethylene and GA break it d.Callus differentiation — Auxin and cytokininsarrow_forward
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