Transpiration

Answer

Transpiration is the loss of water vapours from aerial parts of a plant. It is a physiological process that occurs mainly through leaves, but also through stems, buds, and flowers.

Answer

Transpiration is a physiological process performed by living cells in plants, while evaporation is a physical process from water surfaces. Transpiration is faster and leads to huge water loss, while e…

Answer

1. Stomatal transpiration (80-90% of total) - through stomata 2. Cuticular transpiration (3-9%) - through cuticle 3. Lenticular transpiration (0.1-0.3%) - through lenticels…

Answer

Cover a potted plant's soil with polythene, place under bell jar sealed with vaseline. After 2 hours in sun, water droplets appear on bell jar's inner wall. Control (pot without plant) shows no drople…

Answer

Dry cobalt chloride paper turns from blue to pink in presence of moisture. When placed in bell jar with plant, paper turns pink due to water vapours from transpiration. In control (no plant), paper re…

Answer

Ganong's potometer measures transpiration rate by measuring water uptake. A leafy shoot is inserted in the apparatus filled with water. As transpiration occurs, an air bubble moves along the scale, in…

Answer

Guard cells are two kidney-shaped cells surrounding each stoma. They contain chloroplasts and have thick inner walls, thin outer walls. They control opening and closing of stomata by becoming turgid (…

Answer

Guard cells perform photosynthesis and produce glucose, increasing their osmotic pressure. They become hypertonic, absorb water by endosmosis, become turgid. Outer walls push outward, creating tension…