Biology
12th Edition
ISBN: 9780134813448
Author: Audesirk, Teresa, Gerald, Byers, Bruce E.
Publisher: Pearson,
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Chapter 46, Problem 1FIB
Summary Introduction
Introduction:
Plant hormones play an essential role in the life cycle of plants. Plant hormones are the chemicals secreted by specific cells and transported via xylem and phloem to other parts of the plants. There are six major plant hormones: auxin, gibberellin, cytokinin, ethylene, abscisic acid, and florigen. Each plant hormone has different function and they regulate the development of plants through its life cycle.
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Which of these is caused by the effects of auxin? (choose all that apply) 1.Maintaining apical dominance 2.suppressing lateral bud growth 3. stimulating root growth in stem leaf buds 4.stimulating root elongation 5. preventing seed germination 6.phototropism
Which 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 acid
Auxin, like many substances, can be transported through the phloem; however, there is a second mechanism that exists just for auxin transport. What is it?
Chapter 46 Solutions
Biology
Ch. 46.1 - list six important types of plant hormones?Ch. 46.1 - Prob. 2CYLCh. 46.2 - Explain how the Darwin experiments using caps and...Ch. 46.2 - Prob. 1CTCh. 46.2 - Prob. 2TCCh. 46.2 - Prob. 3TCCh. 46.2 - Agricultural biotechnologists have developed...Ch. 46.2 - explain the roles of plant hormones in seed...Ch. 46.2 - Prob. 2CYLCh. 46.2 - Prob. 3CYL
Ch. 46.2 - Prob. 4CYLCh. 46.2 - Prob. 5CYLCh. 46.2 - Prob. 6CYLCh. 46.3 - Although insects are major plant predators,...Ch. 46.3 - Prob. 1HYEWCh. 46.3 - explain how plants that are attacked by predators...Ch. 46.3 - explain how plants that are attacked by predators...Ch. 46.3 - Prob. 3CYLCh. 46.3 - Prob. 4CYLCh. 46.3 - Prob. 1TCCh. 46 - Prob. 1MCCh. 46 - Prob. 2MCCh. 46 - Prob. 3MCCh. 46 - Prob. 4MCCh. 46 - Prob. 5MCCh. 46 - Prob. 1FIBCh. 46 - Prob. 2FIBCh. 46 - Prob. 3FIBCh. 46 - Prob. 4FIBCh. 46 - The hormone _________ causes stomata to close when...Ch. 46 - Compare phototropism and gravitropism in roots and...Ch. 46 - Prob. 2RQCh. 46 - What is a phytochrome? How do the two forms of...Ch. 46 - Which hormones cause fruit development? Which...Ch. 46 - What is senescence? Describe some changes that...Ch. 46 - Prob. 6RQCh. 46 - Describe one example of a plant chemical defense...Ch. 46 - Describe how a sensitive plant closes its leaves....Ch. 46 - A student reporting on a project said that one of...Ch. 46 - Prob. 2AC
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Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, biology and related others by exploring similar questions and additional content below.Similar questions
- Each unit of stem that consists of a leaf, axillary bud and internode is referred to as a phytomere. Note that axillary buds always occur above a leaf. Axillary buds give rise to branch shoots. Thus, branching in a shoot system is exogenous (of external origin). How does this compare to branching in a root system?arrow_forwardThe nodes are the points at which roots are attached to the plant True Falsearrow_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_forward
- It is the superficial tissue in a herbaceous stems. ______________________ The tissue of the stem cortex that primarily function for storage. __________________________________ Stem cortical layer present only in the underground stem. _____________________________________________________arrow_forwardIn comparison with stems, roots secondary xylem exhibits..... 1. wider vessels 2. primary xylem outside of the secondary xylem 3. greater lignification 4. more derived parenchyma cells 5. less amount of parenchymaarrow_forwardOn a hot, dry day a plant closes its stomata thereby conserving water. Which plant hormone is responsible for the closing of the stomata? ethylene abscisic acid cytokinin auxin gibberellinarrow_forward
- 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 cytokininarrow_forwardPositive thigmotropism is a response in plants in which they move and grow toward an object the plant comes into physical contact with , usually curling around the object. This response of the shoot system benefits the plant by allowing the plant to -arrow_forwardWhat would happen if you removed the shoot apical meristem of a plant? -The plant would grow several lateral shoots -Growth would only occur at in the roots. -The plant would mature, but only through vertical growth--no branches would form. -The root apical meristem would take over the function of the shoot apical meristem.arrow_forward
- Some plant hormones oppose the effect of each other. Auxins and cytokinins for example. Whereas auxins prevent shoots from branching, cytokinins promote the development of branches. What other hormones also exhibit such opposing effects? Explain your answer briefly.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_forwardWhat do you mean by wilting? State a condition for a plant to wilt.arrow_forward
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