ANIMAL KINGDOM || SYMMETRY
Автор: NOOM BIOLOGY - NOORAIN MUSHTAQUE
Загружено: 2025-12-26
Просмотров: 213
In this video, we explain Symmetry in Animals in a simple and exam-oriented way, exactly as given in NCERT Biology.
You will learn how animals are classified on the basis of symmetry and why symmetry is an important criterion in animal classification.
We discuss all three types of symmetry:
Asymmetry – absence of symmetry, seen in sponges
Radial symmetry – body parts arranged around a central axis (coelenterates, echinoderms)
Bilateral symmetry – body divided into left and right halves in one plane (annelids, arthropods, chordates)
This video also explains what information symmetry gives us about an animal, such as:
Level of body organisation
Movement and lifestyle
Development of head (cephalisation)
Nervous system development
Evolutionary position
A comparison chart is used to make the concept easy and memorable.
The explanation is useful for Class 11 Biology, NEET, CUET, and other competitive exams.
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