Review the key concepts, formulae, and examples before starting your quiz.
🔑Concepts
Plants are primarily classified into three categories based on their height, nature of stem, and branching pattern: Herbs, Shrubs, and Trees.
Herbs: These are short plants with green, tender stems and usually do not have many branches. Examples include wheat, paddy, and coriander.
Shrubs: These plants develop branches near the base of the stem. The stem is hard but not very thick. Examples include rose, hibiscus, and lemon.
Trees: These are very tall plants with hard and thick brown stems called trunks. The stems have branches in the upper part, much above the ground. Examples include Neem, Mango, and Peepal.
Creepers: Plants with weak stems that cannot stand upright and spread on the ground (e.g., Pumpkin, Watermelon).
Climbers: Plants that take support on neighboring structures and climb up (e.g., Money plant, Grapevine).
Photosynthesis: The process by which green leaves prepare food using carbon dioxide () and water () in the presence of sunlight and a green pigment called chlorophyll. The chemical representation is: .
Transpiration: The process by which water () comes out of leaves in the form of vapor through stomata.
📐Formulae
💡Examples
Problem 1:
A plant has a green and tender stem and is less than meter in height. Categorize the plant and give one property.
Solution:
Herb.
Explanation:
Plants with green and tender stems that are generally short are classified as Herbs. They usually have a soft -rich tissue structure.
Problem 2:
Differentiate between a Shrub and a Tree based on the branching pattern.
Solution:
Shrubs branch near the base, while Trees branch high above the ground.
Explanation:
In Shrubs, the hard stem starts branching out very close to the soil level. In Trees, the thick trunk remains unbranched for a significant height before the canopy begins.
Problem 3:
Identify the gas released during the process of photosynthesis by a plant.
Solution:
Oxygen ().
Explanation:
During photosynthesis, plants take in and release as a byproduct, which is essential for the survival of aerobic organisms.