Supporting tissues keep plants upright. Collenchyma provides flexibility, allowing fresh twigs to bend without breaking. Sclerenchyma makes seed coats hard and strong. Specialised parenchyma with air spaces helps aquatic plants float easily on water surfaces.
What keeps a plant upright? Why does a fresh twig bend but a dry twig break? Why are seed coats hard and how do aquatic plants float?
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Plants remain upright due to supporting tissues like parenchyma, collenchyma and sclerenchyma. Fresh twigs bend because flexible collenchyma supports them, while dry twigs break because they lose flexibility. Sclerenchyma makes seed coats hard and strong due to lignin deposition. In aquatic plants, specialised parenchyma contains air spaces that reduce weight and help plants float on water.
For more NCERT Solutions of Class 9 Science Exploration Chapter 3 Tissues in Action Question Answer (2026-27)
https://www.tiwariacademy.com/ncert-solutions/class-9/science/exploration-chapter-3/