Root hairs absorb nutrients and water from the soil. The process involved is as follows:
- The surface area of root hairs is large when in contact with soil
- These root hairs penetrate deep into the soil, and the cell membrane allows soil water to enter into the roots
- Also, with the process of osmosis, the vacuoles and cytoplasm also help in the absorption of water
On adding fertilizers to the soil, root hairs become flaccid as the protoplasm shrinks due to the formation of a hypertonic solution. Green plants require water for various purposes such as:
- It is a major raw material for the process of photosynthesis
- The enzymatic and metabolic reactions occur in presence of water
Find answers to all the questions based on toxicity, cohesive and adhesive forces, the difference between diffusion and osmosis, plasmolysis, active and passive transport, etc. in the ICSE Selina publications Class 10 Biology Chapter 3 given here. Download for free.