Unlike animals, plants have localized regions of active cell division called .
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: The activation of the metabolic machinery of the seed, leading to the emergence of the radicle and plumule. Vegetative Phase Unlike animals, plants have localized regions of active
Insert a 10-second MP4 timelapse of a bean sprouting (available royalty-free on Pexels or Pixabay). This dramatically increases audience engagement. : The activation of the metabolic machinery of
The coordination of growth and development is largely governed by plant hormones (phytohormones). Auxins are crucial for cell elongation and apical dominance, ensuring the main stem grows taller than lateral branches. Gibberellins promote stem elongation and trigger seed germination. Cytokinins work antagonistically to auxins, promoting cell division and delaying aging in leaves. Meanwhile, Abscisic Acid (ABA) acts as a "stress hormone," inhibiting growth during harsh conditions and closing stomata to conserve water. The interplay of these chemical messengers ensures the plant responds appropriately to internal signals and external stimuli.