This chapter explains that Earth is home to a great variety of living organisms, known as diversity. Living beings differ in their size, shape, colour, structure, habits, and ways of living. Plants, animals, and microorganisms all play important roles in nature—plants provide food and oxygen, animals show diversity in body coverings, food habits, and movement, while microorganisms can be both useful and harmful. To study this vast variety easily, organisms are classified based on similarities and differences. Living beings have special features called adaptations that help them survive in their specific habitats such as deserts, forests, oceans, and polar regions. The chapter highlights that biodiversity is essential for maintaining balance in nature and supporting life on Earth by providing food, medicines, clothing, and other resources.
Key Points
The Earth is full of a wide variety of plants, animals, and microorganisms—this variety is called diversity.
Living organisms differ in shape, size, colour, structure, and way of living.
Plants: Provide food, oxygen, medicines, wood, and shelter.
Animals: Differ in body coverings (hair, scales, feathers), food habits (herbivores, carnivores, omnivores), and movement (flying, walking, swimming).
Microorganisms: Tiny organisms not visible to the naked eye. Some are useful (yeast in bread, bacteria in curd) while some are harmful (cause diseases).
Classification: Grouping of living organisms based on similarities and differences to study them easily.
Adaptation: Special features that help living beings survive in their surroundings (camel in desert, fish in water, cactus in dry areas).
Habitats: Natural homes of organisms such as forests, deserts, oceans, rivers, mountains, and polar regions.
Importance of diversity: Keeps balance in nature, provides food, clothing, medicines, and raw materials, and ensures survival of life on Earth.
👉 👉The beauty of our planet lies in its diversity. We must respect, conserve, and protect all forms of life to maintain balance in nature and ensure a healthy future.