Review the key concepts, formulae, and examples before starting your quiz.
🔑Concepts
The plant body is divided into two main systems: the Root System (found below the soil) and the Shoot System (found above the soil).
The Root System consists of two types: Taproots (one main thick root, e.g., carrot) and Fibrous roots (a cluster of many thin roots, e.g., grass). Roots absorb water () and essential minerals from the soil.
The Stem acts as a pillar for the plant, transporting and minerals from the roots to the leaves and carrying prepared food to all other parts.
The Leaf is the 'Food Factory' or 'Kitchen' of the plant. It contains a green pigment called Chlorophyll that captures energy from sunlight.
Photosynthesis is the process where green leaves use (Carbon Dioxide), (Water), and sunlight to prepare food (Glucose) and release (Oxygen).
Stomata are tiny pores located on the surface of leaves that allow for the exchange of gases like and , and the release of excess through Transpiration.
The Flower is the reproductive part of the plant that eventually turns into a fruit containing seeds.
📐Formulae
💡Examples
Problem 1:
Explain why a leaf is green in color and name the substance used for testing its food content.
Solution:
Chlorophyll and Iodine solution.
Explanation:
Leaves are green because they contain a pigment called Chlorophyll. When testing for the presence of food (starch) in a leaf, we use an Iodine solution which turns blue-black.
Problem 2:
What are the essential raw materials required for a plant to perform photosynthesis?
Solution:
, , Sunlight, and Chlorophyll.
Explanation:
A plant needs Carbon Dioxide () from the air, Water () from the soil, Sunlight from the sun, and Chlorophyll present in the leaves to produce glucose.
Problem 3:
If you cover a leaf with a plastic bag, you see tiny droplets of inside. Name this process.
Solution:
Transpiration.
Explanation:
Transpiration is the process by which plants lose excess water in the form of water vapor () through the stomata present on the leaves.