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It allows plants … c) Sites of photoperiodic perception in vegetative plants are _____ A.1. In the following section, the important multiple-choice questions on plant hormones have been compiled. It occurs widely in plants and is particularly abundant in sugar cane and sugar beet (15-20%), from which it is extracted and refined for table sugar. In some LD plants the increased flowering may be associated with the elongation of internodes caused by GA. Q.2. An increase in Auxin levels. It is primarily involved in cell growth and its differentiation. Colchicine is an alkaloid prepared from the dried corns and seeds of Colchicum autumnale, the autumn crocus or meadow saffron. This concise article on MCQs on plant hormones will ensure you know the most vital questions regarding this topic. List the PGS (Plant growth substances) that needs to be used to have practical applications in the following: a) Improve yield of sugarcane b) … it induces and promotes cell division in plants. a) Log phase of an S-curve/Exponential b) IAA/Auxin c) Leaves. It also affects apical dominance, axillary bud … (c) Gamma rays (from cobalt 60) are generally used for induced mutagenesis in crops. Role of Leaves in Ethylene-induced Femaleness of Cucumber Plants. If heated to 200 ° C sucrose becomes caramel. Can you explain this answer? PEG solutions induce tight adhesion of protoplasts owing to electrostatic forces. Cytokinin is a plant cell division hormone, i.e. 3. Gibberellins have been shown to induce flowering in several plant species. Plants have a number of sophisticated uses for light that go far beyond their ability to photosynthesize low-molecular-weight sugars using only carbon dioxide, light, and water. 1972). Which of the following could be used to induce greenhouse plants to flower out of season? Basically, the colchicine prevents the microtubule formation during cell division, thus … Flower growth on a plant is an essential part of the plant's reproduction. All Important MCQs on Plant Hormones. Jan 02,2021 - Which of the following method of reproduction induces over-crowding in plantsa)Vegetative Ppropagationb)Tissue culturec)Asexual reproductiond)sexual reproductionCorrect answer is option 'A'. The technique of protoplast fusion involves the chemical PEG and Sodium nitrate. The healthy growth of plants requires all fertilizer elements; a lack of one can result in many symptoms. | EduRev Class 10 Question is disucussed on EduRev Study Group by 466 Class 10 Students. Treatment with auxin or gaseous ethylene, ethephon, or ethrel (all ethylene-releasing substances from plant tissues) induces the development of female flowers (Rudich et al. Leaves fall due to A decrease in Abscisic acid. Photomorphogenesis is the growth and development of plants in response to light. They have been demonstrated to cause flower initiation in LD plants like Beta, Brassica, etc. Different species respond differently to different gibberellins. I Cutting the shoot tips II Lighting the plants to increase the length of the day III Planting the seeds in a different season IV Darkening the greenhouse to decrease the length of the day A I only B 1 and II and IV only C IIand III only D All of them 4. It is often used to induce polyploidy in plants. The presence of the Na+ ion induces localized realignment of the lipo-protein in the membrane which in turn allows fusion to occur when two such regions come into contact. Explanation: Subjecting plants to physical and chemical agents in order to alter their DNA and introduce traits that can be passed on to the offsprings is commonly referred to as induced mutagenesis. 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