All Important MCQs on Plant Hormones. Q.2. They have been demonstrated to cause flower initiation in LD plants like Beta, Brassica, etc. Which of the following could be used to induce greenhouse plants to flower out of season? This concise article on MCQs on plant hormones will ensure you know the most vital questions regarding this topic. it induces and promotes cell division in plants. An increase in Auxin levels. a) Log phase of an S-curve/Exponential b) IAA/Auxin c) Leaves. The technique of protoplast fusion involves the chemical PEG and Sodium nitrate. Gibberellins have been shown to induce flowering in several plant species. It allows plants … List the PGS (Plant growth substances) that needs to be used to have practical applications in the following: a) Improve yield of sugarcane b) … Role of Leaves in Ethylene-induced Femaleness of Cucumber Plants. 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'. It is primarily involved in cell growth and its differentiation. 3. Colchicine is an alkaloid prepared from the dried corns and seeds of Colchicum autumnale, the autumn crocus or meadow saffron. 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. 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. Flower growth on a plant is an essential part of the plant's reproduction. 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. 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. PEG solutions induce tight adhesion of protoplasts owing to electrostatic forces. Can you explain this answer? Basically, the colchicine prevents the microtubule formation during cell division, thus … 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. | EduRev Class 10 Question is disucussed on EduRev Study Group by 466 Class 10 Students. Cytokinin is a plant cell division hormone, i.e. Different species respond differently to different gibberellins. It also affects apical dominance, axillary bud … If heated to 200 ° C sucrose becomes caramel. 1972). c) Sites of photoperiodic perception in vegetative plants are _____ A.1. It is often used to induce polyploidy in plants. In some LD plants the increased flowering may be associated with the elongation of internodes caused by GA. The healthy growth of plants requires all fertilizer elements; a lack of one can result in many symptoms. 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