BIOLOGY:CONCEPTS+APPL.(LOOSELEAF)
10th Edition
ISBN: 9781305967359
Author: STARR
Publisher: CENGAGE L
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Textbook Question
Chapter 27, Problem 14SA
Which of the following statements is false?
| a. Auxin and gibberellin promote stem elongation b. Cytokinin promotes cell division in shoot tips c. Abscisic acid promotes water loss and dormancy d. Ethylene promotes fruit ripening and abscission. |
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Which 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 abscission
Which of the following statements about phototropism is/are not true?
A. Red light is the most effective light wavelength for positive phototropism of plants.
B. Higher auxin concentration on the lighted side causes that side to elongate more than the non illuminated side.
C. Phototropins are the only effective light receptors in phototropism.
D. Phototropism decreases the plant's ability to enhance photosynthetic capacity.
E. All of the above
F. None of the above
Which of the following is true regarding germination?
a.
Imbibition of water is the first step of germination
b.
All are true regarding germination
c.
Shoots emerge first, then roots
d.
The seed coat stays intact during germination
e.
Freezing and thawing can help start germination
Chapter 27 Solutions
BIOLOGY:CONCEPTS+APPL.(LOOSELEAF)
Ch. 27 - An animal pollinator may be rewarded by _______...Ch. 27 - The arrival of pollen grains on a receptive stigma...Ch. 27 - Prob. 3SACh. 27 - In flowers, the structures that produce male...Ch. 27 - Seeds are mature _______ ; fruits are...Ch. 27 - Prob. 6SACh. 27 - The three main parts of a typical mature eudicot...Ch. 27 - Prob. 8SACh. 27 - Prob. 9SACh. 27 - Prob. 10SA
Ch. 27 - Prob. 11SACh. 27 - Prob. 12SACh. 27 - Prob. 13SACh. 27 - Which of the following statements is false? a....Ch. 27 - Match the observation with the main hormones.. ___...Ch. 27 - The oat coleoptiles on the left have been...Ch. 27 - Is the seedling shown on the right a monocot or...Ch. 27 - Prob. 3CTCh. 27 - Prob. 4CT
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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_forwardWhich of the following statements is false? a. Ferns produce seeds inside sori. b. Conifers do not produce fruits. c. Both gymnosperms and angiosperms produce pollen. d. Only angiosperms produce flowersarrow_forwardModified leaves that enable a stem to climb are called __________, whereas modified leaves that cover the winter buds of a dormant woody plant are called __________. (a) spines; bud scales (b) bud scales; tendrils (c) tendrils; bud scales (d) tendrils; spines (e) carnivorous leaves; spinesarrow_forward
- Which of the following statements is false? a. Auxin and gibberellin promote stem elongation. b. Cytokinin promotes cell division in shoot tips. c. Abscisic acid promotes water loss and dormancy d. Ethylene promotes fruit ripening and abscission.arrow_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_forwardWhich of the following plant hormones is produced in the root meristems, travel upward and in higher concentration counter the apical dominance caused by ____________? a. Gibberellins b. Ethylene c. Cytokinin d. Abscisic acidarrow_forward
- 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.arrow_forwardElevated levels of this hormone promote seed dormancy? Select one: a. gibberellin b. abscisic acid c. ethylene d. salicyclic acid e. auxinarrow_forwardWhat do you mean by wilting? State a condition for a plant to wilt.arrow_forward
- Match the hormone with the description. ___ ethylene a. efflux carriers set up gradients ___ cytokinin b. produced in positive and ___ auxin negative feedback loops ___ gibberellin c. affects expression of more ___ ABA genes than any other hormone ___ nitric oxide d. works antagonistically to auxin in apical dominance e. big in stems f. active in burstsarrow_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_forward
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