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Introduction:
The plant hormones can be defined as certain chemicals that are responsible for triggering some responses within the body of the plant. These hormones cause the response to gravity, light or touch. These hormones also give quick responses to stimuli.
Answer to Problem 1TY
The correct option is (c).auxin, cytokinin, gibberellin
Explanation of Solution
Explanation/justification for the correct answer:
The option is (c) auxin, cytokinin, gibberellin
The hormones auxins, cytokinins, and gibberellins are called plant hormones. Auxin is responsible for growth, cytokinins are responsible for cell division and gibberellins are responsible for stimulating cell division.
Explanation of incorrect answer:
Option (a) cyclic AMP, IP3 and calcium ions.
The ions cyclic AMP, IP3, and calcium ions are called as secondary messengers and are found in animal and plant cells. These are responsible for the transmission of messages from a different type of receptors and hormones. Hence option (a) is incorrect.
Option (b) calcium, CPDKs, and DELLA proteins
The calcium, CPDKs, and DELLA are called proteins. The CPDK called as effector, influences cellular response like closing and opening of ion channels. The protein DELLA is responsible for restricting the cell division process when gibberellin hormones are present. These are not hormones. Hence, option (b) is incorrect.
Option (d) chlorophyll, carotenoids, and phytochrome
Chlorophyll is the green pigment in a plant that helps in photosynthesis. Carotenoids are responsible for yellow, orange and red. Phytochromes are photoreceptors in plants that detect light. As these are not hormones, the answer is incorrect.
Option ( e) statoliths, pulvini, and parenchyma
Statoliths are plastids present in root cells. Pulvini help in response quick touch. The parenchyma tissue transfers oxygen into shoots and roots. As this is not hormones, option (e) is incorrect.
The major type of plant hormones includes auxin, cytokinins, and gibberellins hormones. Auxin helps in growth and the behavior of the plant. On the other hand, cytokinins and gibberellins and responsible for the promotion of cell division and aging and stimulation of cell division, elongation respectively. Hence, the option (c) is correct.
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Chapter 29 Solutions
Gen Combo Principles Of Biology; Connect Access Cards
- The stress hormone that helps plants respond to drought is (a) auxin (b) gibberellin (c) cytokinin (d) ethylene (e) abscisic acidarrow_forwardWhich plant hormone is known as germination inhibitor? gibberellin ethylene abscisic acid auxinarrow_forwardYour concept map must include details about the following topics: types of stimuli plants respond to, 3 stages of cell signaling, 6 major plant hormones Six main types: Auxins, abscisic acid, cytokinins, ethylene gibberellin, and brassinosteroids. and their functions, phytochrome, plant responses to light, statocytes, statoliths, plant responses to gravity, plant responses to touch, plant defenses against herbivores, plant defenses against pathogens (hypersensitive response and systemic acquired resistance)arrow_forward
- which is true regarding how auxin impacts bending of plants? auxin increases reversible bending (elasticity) auxin causes the increase of proteins that embed in between cellulose in the cell wall auxin travels to the sunny side of the stem to change growth auxin causes an increase in cell division that results in blending 2. Select all that are true regarding plant responses trophic responses are reversible, repeatable movements independent of the position of the stimulus venus fly trap responses are an example of a nastic movement phytochrome only enters the nucleus to change gene expression when in the active form (Pfr) shade or far red light converts the inactive phytochrome (Pr) to the active form (Pfr)arrow_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_forwardGaseous 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 acidarrow_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_forwardSome 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_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
- 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_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_forwardThe conducting tissue found in vascular plants that functions in transportation of nutrients throughout the plant and is made of living sclerenchyma and parenchyma cells is the _________ -endosperm. -xylem. -sporopollenin. -lycophyll. -phloem.arrow_forward
Biology (MindTap Course List)BiologyISBN:9781337392938Author:Eldra Solomon, Charles Martin, Diana W. Martin, Linda R. BergPublisher:Cengage Learning