Root Hairs

The video explains how plants adapt to extreme environments like deserts by using specialized root systems. It highlights the role of root hairs in absorbing water through osmosis and the active transport of minerals. The continuous regeneration of root hairs ensures plants can thrive even in harsh conditions.

How do desert pea plants adapt to scarce rainfall?

• By having a shallow but extensive root system

• By having deep roots to reach underground water

• By storing water in their leaves

• By closing their stomata during the day

What is the primary function of root hairs in plants?

• To store nutrients for the plant

• To anchor the plant firmly in the soil

• To increase the surface area for water absorption

• To protect the roots from pests

Through which process do root hairs absorb water?

• Osmosis

• Active transport

• Evaporation

• Diffusion

Why do root hairs require energy to absorb minerals?

• Because minerals are absorbed through diffusion

• Because minerals are in high concentration in the soil

• Because minerals are absorbed against the concentration gradient

• Because minerals are absorbed through osmosis

What happens to old root hairs as the roots grow?

• They become thicker and stronger

• They are replaced by new root hairs

• They store more water

• They convert into leaves