Selina Class 7 Biology Solutions Chapter-3 Classification of Animals
Understanding the diversity of animals becomes much easier with Selina Class 7 Biology Solutions for Chapter-3 Classification of Animals. This chapter is important for students preparing for school exams because it explains how living organisms are grouped based on common features and body structure. The chapter in Selina Solutions for ICSE board helps students learn about vertebrates, invertebrates, habitat-based classification, food habits, and movement patterns of animals. The explanations in this chapter are designed in a simple manner so students can easily understand the scientific methods used to classify animals into different groups.
Find the Exercise-wise PDF of Selina Class 7 Biology Solutions chapter-3 Classification of Animals.
Importance of Chapter-3 Classification of Animals
Classification is necessary because millions of animal species exist on Earth. Studying each animal separately would be difficult, so scientists group animals according to similarities in structure, habitat, movement, and food habits. This chapter helps students understand the scientific approach used in biology to organize living organisms.
The chapter begins with the difference between vertebrates and invertebrates. Vertebrates are animals that possess a backbone, while invertebrates do not have one. Students learn examples of both groups and understand how body structure plays an important role in classification.
Major Topics Covered in the Chapter
1. Vertebrates and Invertebrates
One of the most important concepts in this chapter is the division of animals into vertebrates and invertebrates. Vertebrates include fishes, amphibians, reptiles, birds, and mammals. Invertebrates include insects, worms, snails, and octopuses.
Students learn that vertebrates generally have a well-developed nervous system and internal skeleton. Invertebrates, although smaller in size in many cases, form the largest group of animals on Earth.
2. Classification Based on Habitat
Animals are also classified according to the places where they live. The chapter explains:
- Terrestrial animals – animals living on land such as lions, elephants, and camels.
- Aquatic animals – animals living in water such as fishes and whales.
- Amphibians – animals that can live both on land and in water, such as frogs.
- Aerial animals – animals that spend most of their time in the air, such as birds and bats.
This topic helps students understand how body features are adapted to the environment.
3. Classification Based on Food Habits
The chapter also explains how animals are grouped according to the food they eat:
- Herbivores eat plants.
- Carnivores eat flesh.
- Omnivores eat both plants and animals.
- Scavengers feed on dead organisms.
Students understand the relationship between food habits and survival in nature.
4. Classification Based on Movement
Animals move in different ways depending on their body structure. Some walk, some fly, some crawl, and others swim. This section explains how movement helps animals search for food, escape enemies, and survive in their surroundings.
Why Students Should Study This Chapter Carefully
Chapter-3 forms the foundation for advanced biology topics in higher classes. Students who clearly understand classification can easily study animal kingdoms, ecosystems, and evolution later. The exercises in Selina solutions help students improve diagram-based learning, definitions, and scientific reasoning.
The chapter also improves observation skills. Students begin noticing similarities and differences among animals around them. This practical understanding makes biology more interesting and easier to remember during exams.
Benefits of Selina Class 7 Biology Solutions for This Chapter
The solutions help students understand textbook questions step by step. Difficult concepts are explained in easy language suitable for ICSE students. The answers are arranged according to the latest syllabus and examination pattern.
Students can use these solutions for:
- Homework preparation
- Revision before exams
- Understanding textbook exercises
- Learning correct biological terms
- Improving answer-writing skills
Practising these questions regularly helps students gain confidence in biology and score better marks in school examinations.