Review the key concepts, formulae, and examples before starting your quiz.
🔑Concepts
Roots are the part of the plant that usually grow below the ground, moving away from light and towards gravity and moisture.
There are two primary types of root systems: Taproot (a single thick main root with smaller lateral branches, e.g., Carrot, Mustard) and Fibrous root (a cluster of many thin, similar-sized roots, e.g., Grass, Wheat, Rice).
The primary function of roots is the absorption of water () and dissolved minerals from the soil.
Roots provide anchorage, holding the plant firmly in the soil so it doesn't get uprooted by wind or water.
Roots prevent soil erosion by binding the soil particles together, reducing the impact of and wind on the topsoil.
Modified roots perform special functions: storage of food (Carrot, Turnip), providing extra support (Prop roots in Banyan trees), or helping in breathing (Mangroves in marshy areas).
📐Formulae
💡Examples
Problem 1:
Identify the type of root found in a grass plant and explain its structure.
Solution:
Fibrous Root System
Explanation:
Grass has a fibrous root system where many thin roots of roughly the same length grow out from the base of the stem. It does not have a single main root.
Problem 2:
How do roots help the plant obtain even when the topsoil is dry?
Solution:
Deep growth and root hairs.
Explanation:
Taproots can grow deep into the soil to reach lower water tables. Additionally, tiny root hairs increase the surface area for maximum absorption of molecules.
Problem 3:
Why can we eat roots like carrots and radishes?
Solution:
Storage of Food.
Explanation:
In some plants, the extra food prepared by the leaves through photosynthesis is stored in the roots. These are called storage roots, and they become thick and fleshy.