Plant Growth and Development
A seed becomes a tree through regulated growth, not mere swelling. This chapter in NCERT Class 11 Biology, Chapter 13, explains growth phases, arithmetic and geometric growth, differentiation, dedifferentiation, and the roles of auxins, gibberellins, cytokinins, abscisic acid and ethylene. It covers dormancy, germination, photoperiodism, vernalisation and senescence. You will learn to measure growth, interpret growth curves, and see how farmers use hormones to root cuttings, ripen fruit and control flowering.
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