Principles of Biology
2nd Edition
ISBN: 9781259875120
Author: Robert Brooker, Eric P. Widmaier Dr., Linda Graham Dr. Ph.D., Peter Stiling Dr. Ph.D.
Publisher: McGraw-Hill Education
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Question
Chapter 29, Problem 5TY
Summary Introduction
Introduction:
The gaseous hormones can be easily or freely diffused across the membrane which will be synthesized near or at the site of the action. These gaseous hormones are different from the other plant hormones.
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Gaseous hormones are able to enter cells without requiring specialmembrane transporter. Which of the major plant hormones is adiffusible gas?a. auxin b. gibberellin c. cytokinin
d. ethylene
e. abscisic acid
Which plant hormone mediates the seasonal abscission of fruits and leaves?
gibberellin
ethylene
auxin
abscisic acid
cytokinin
Which of the following does auxin cause in the tropism with which it is involved?
increased protein synthesis
increased plasma membrane permeability
hardening of cell walls
cell elongation
rapid cell division
Chapter 29 Solutions
Principles of Biology
Ch. 29.1 - Prob. 1BCCh. 29.1 - Prob. 1TYKCh. 29.2 - Prob. 1CCCh. 29.2 - Prob. 2CCCh. 29.2 - Prob. 1TYKCh. 29.2 - Prob. 2TYKCh. 29.3 - What kind of light does the active conformation of...Ch. 29.3 - Prob. 2CCCh. 29.3 - Imagine a garden that has been planted with...Ch. 29.3 - Prob. 3CC
Ch. 29.4 - Prob. 1CCCh. 29.4 - Prob. 1TYKCh. 29.5 - Prob. 1CCCh. 29.5 - In what way is systemic acquired resistance to...Ch. 29.5 - Prob. 1TYKCh. 29 - Prob. 1TYCh. 29 - Prob. 2TYCh. 29 - Prob. 3TYCh. 29 - Prob. 4TYCh. 29 - Prob. 5TYCh. 29 - Photoreceptor molecules allow plant cells to...Ch. 29 - Prob. 7TYCh. 29 - Prob. 8TYCh. 29 - Prob. 1CCQCh. 29 - Prob. 2CCQCh. 29 - Prob. 3CCQCh. 29 - Prob. 1CBQCh. 29 - How could you increase the resistance of a...
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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. 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_forwardMatch the observation with the main hormones.. ___ ethylene a. Your cabbage plants bolt they form elongated flowering stalks. ___ cytokinin b. The potted plant in your room is leaning toward the window ___ auxin c. Lateral buds are sprouting. ___ gibberellin d. The seeds of your roommates marijuana plant do not germinate no matter what he does to them. ___ abscisic acid e. The last of your apples is getting really mushy ___ nitric oxide f. Your lettuce plants develop brown spots on their leaves.arrow_forward
- Greenhouse-grown tomato seedlings are often brushed by hand to simulate wind. This causes seedlings to grow slower, thicken stems, & resist mechanical wind damage when planted in the field. Which hormone is responsible? Auxin Salicylic acid Gibberellin Abscisic acid cytokinin Ethylenearrow_forwardIf a farmer wanted less tightly packed clusters of grapes, he would most likely spray the immature bunches with which of the following hormones? cytokinins gibberellins auxin abscisic acidarrow_forwardWhich plant hormone is known as germination inhibitor? gibberellin ethylene abscisic acid auxinarrow_forward
- The summer is not optimal for grape growing and you're searching in your memory for something regarding plant hormones. Explain 2 ways you could utilize plant hormones (choose from auxin, ethylene, cytokinin, gibberellin, abscisic acid, salicylic acid, jasonic acid) to compensate for a problem during growing. For each way: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• On a commercial scale, enhancing the level of _______ (hormone) can help to speed up fruit ripening. • What measure do fruit producers take to slow down fruit ripening that is caused by natural ethylene?• What is a ‘triple response’. Which plant hormone initiates a triple response? • A change in the ratio of ethylene to auxin controls abscission. In the autumn, the amount of __________ decreases, rendering the cells of the abscission layer more sensitive to __________.arrow_forward
- Examples of plant hormones includea. cyclic AMP, IP3, and calcium ions.b. calcium, CDPKs, and DELLA proteins.c. auxin, cytokinin, and gibberellin.d. cryptochrome, phototropin, and phytochrome.e. statoliths, pulvini, and aerenchyma.arrow_forwardPlant cells communicate in a variety of ways to elicit cellular responses. In the figure below the plant is responding the presence of light with the release of auxin. Auxin was first discovered for its ability to promote growth in plants. It is a plant hormone that inhibits the lengthening and stimulate the formation of lateral roots and root hairs. a) Describe the plant’s response to the presence of light. (refer to picture)arrow_forwardLast Valentine's day, an 18-year old girl received a bouquet of flowers from the boy that she likes. She wanted to keep the cut flowers for a few more days so she asked for your advice on how she can retain the freshness of the flowers. Given this situation, what specific plant hormone would you recommend to her? a. abscisic acid b. auxin c. ethylene d. gibberellin e. cytokininarrow_forward
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