CBSE Class 11 Plant Growth and Development — practice questions
34 free MCQs with worked solutions. Tap any question for the answer + explanation, or practice them all in the app.
Practice CBSE Class 11 Plant Growth and Development in the app →Apical meristems are responsible forThe typical growth curve of a plant or organ isWhich is the most reliable measure of plant growth?Differentiation in plants refers toDedifferentiation is best illustrated byHeterophylly in coriander or aquatic buttercup demonstratesAuxin is produced primarily atGibberellins are best known for inducingIn tissue culture, a HIGH auxin to LOW cytokinin ratio in the medium favoursEthylene is unique among plant hormones because it isWheat is a long-day plant, which means it flowers whenVernalisation refers toA leaf unfolds and expands. Is this growth?Plants can keep growing all their lives because they have:A tree trunk gets thicker every year. This increase in girth is:At the cell level, growth is mainly an increase in the amount of:One maize root tip can make more than ___ new cells per hour.The three phases of growth are meristematic, elongation and:A cell forming a tracheary element loses its protoplasm. This maturing for a job is:Mature parenchyma cells start dividing again to form cork cambium. This is:Auxins, gibberellins and cytokinins are grouped as plant growth:Darwin and his son saw canary grass coleoptiles bend towards light. This response is:Kurosawa found rice seedlings grew foolishly tall after fungal filtrate. The substance was:Ripe oranges gave off a gas that ripened stored bananas. The gas was:A gardener dips stem cuttings in a powder to make roots grow. The powder holds:The growing apical bud stops side buds from growing. This is:Tea gardeners pinch off shoot tips so that:2,4-D kills dicot weeds in a lawn but spares the grass because it does not affect mature:Grape growers spray a PGR to lengthen the bunch stalks. It is a:Fruits ripen faster in a closed box thanks to a gas they release. The gas is:In a drought a hormone closes the stomata and is called the stress hormone. It is:ABA mostly acts as an antagonist of:Plants that flower only when light lasts longer than a critical time are:Which part of the plant senses day length?