Biology: The Unity and Diversity of Life (MindTap Course List)
15th Edition
ISBN: 9781337408332
Author: Cecie Starr, Ralph Taggart, Christine Evers, Lisa Starr
Publisher: Cengage Learning
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Chapter 30, Problem 7SQ
Summary Introduction
Concept introduction: Plant hormones are chemical molecules produced by plants in extremely low concentration for regulating growth and development. There are five major hormones involved in the growth process. They are auxin, gibberellin, ethylene, abscisic acid, and cytokinin. Each of these hormones has their own functions at specific locations. The presence of these hormones in a definite amount is very essential for the normal growth and development of the plant.
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Which 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 cytokinin
What is the tropic response called when a plant grows around an external object like a stake or pole?
A. thigmotropism
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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
Chapter 30 Solutions
Biology: The Unity and Diversity of Life (MindTap Course List)
Ch. 30 - Volatile Secondary Metabolites in Plant Stress...Ch. 30 - Volatile Secondary Metabolites in Plant Stress...Ch. 30 - Volatile Secondary Metabolites in Plant Stress...Ch. 30 - Prob. 4DAACh. 30 - Prob. 1SQCh. 30 - Prob. 2SQCh. 30 - Prob. 3SQCh. 30 - _______ is the hormone in most rooting compounds....Ch. 30 - Prob. 5SQCh. 30 - Prob. 6SQ
Ch. 30 - Prob. 7SQCh. 30 - Ethylene differs from other hormones in that it...Ch. 30 - Prob. 9SQCh. 30 - Prob. 10SQCh. 30 - Prob. 11SQCh. 30 - Prob. 12SQCh. 30 - Match the hormone with the description. _____...Ch. 30 - Prob. 14SQCh. 30 - Prob. 15SQCh. 30 - Professional gardeners often soak seeds in...Ch. 30 - Photosynthesis sustains plant growth, and inputs...Ch. 30 - Prob. 3CTCh. 30 - Cattle in industrial dairy farms are typically...Ch. 30 - The oat coleoptiles on the left have been...
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- What would be the consequence of removing the Casparian strip? a. Water and mineral nutrients would not be able to reach the xylem. b. There would be less selectivity as to what passed into the xylem. c. Water and mineral nutrients would be lost from the xylem back into the soil. d. Water and mineral nutrients would no longer be able to pass through the cell walls of the endodermis.arrow_forwardA decrease in the level of which hormone releases seeds from dormancy? a. abscisic acid b. cytokinin c. ethylene d. gibberellic acidarrow_forwardWhat happens when a stem is positively tropic to a certain stimulus? a. Auxins will respond by increasing the growth rate of the side facing that stimulus.b. The stem will respond by growing towards that stimulus.c. The stem will grow and bend away from that stimulus.d. The stem will respond by accumulating auxins in the side facingthat stimulus.arrow_forward
- Which plant tissue provides support and mechanical strength to the plant? A. Parenchyma tissue B. Xylem tissue C. Collenchyma tissue D. Sclerenchyma tissuearrow_forwardWhich structure is involved in the transport of gibberlins through out the plant? A. Cork cambium B. Guard cells C. Vascular tissue D. Apical meristemarrow_forwardWhich plant organ exhibits only determinate growth? a. root b. stem c. leaf d. all organs above only grow determinatelyarrow_forward
- Elevated levels of this hormone promote seed dormancy? Select one: a. gibberellin b. abscisic acid c. ethylene d. salicyclic acid e. auxinarrow_forwardHow would a loss-of-function mutation in the α-amylase gene affect seed germination? a. The seed could not imbibe water. b. The embryo would starve. c. The seed coat would not rupture. d. The seed would germinate prematurely.arrow_forwardWrite an account on interactions between gibberellins, indole acetic acid and abscisic acid in plant growth promotion and seed germination.arrow_forward
- which statement about stems is true? a. Gymnosperms have herbaceous stems. b. Woody stems produce xylem and phloem only once during the life of a plant. c. The vascular bundles are arranged in a circle in herbaceous monocot stems. d. Stems connect the vascular tissue from shoot to root.arrow_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_forwardExplain the advantage of using plant hormones to control weeds in fields of cropsarrow_forward
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