Biology · Class 11 · Chapter 4
Animal Kingdom
12 lessons 96 min 2 simulations
More than a million animal species have been described, so the chapter first sets up the few body features used to sort them: level of organisation, symmetry, germ layers, body cavity, segmentation and notochord. It then walks through the eleven phyla from Porifera to Chordata, and inside Chordata through the classes from Cyclostomata to Mammalia, giving each group's defining features and standard examples.
What the exam asks
NEET leans heavily on this chapter. It asks which phylum shows a given feature (choanocytes, cnidoblasts, comb plates, flame cells, nephridia, malpighian tubules, radula, water vascular system, proboscis gland), matches genera with their common names and groups, and tests Table 4.1 (chordates versus non-chordates) and Table 4.2 (the phylum summary). Marks are lost on the exceptions: echinoderm larvae are bilateral, crocodiles have a four-chambered heart, Nereis is dioecious while earthworms and leeches are monoecious, the platypus lays eggs, and Hemichordata is now a non-chordate phylum.
Lessons
12 lessons · 96 min
1Levels of organisationNCERT §4.1, §4.1.17 min2Symmetry and germ layersNCERT §4.1.2, §4.1.36 min3Coelom, segmentation and notochordNCERT §4.1.4–§4.1.6, Figure 4.410 min 1 sim4Sponges, cnidarians and comb jelliesNCERT §4.2.1–§4.2.38 min5Flatworms, roundworms and annelidsNCERT §4.2.4–§4.2.67 min6Arthropods and molluscsNCERT §4.2.7, §4.2.87 min7Echinoderms and hemichordatesNCERT §4.2.9, §4.2.107 min8Chordates and non-chordatesNCERT §4.2.11, Table 4.17 min9Jawless and jawed fishesNCERT §4.2.11.1–§4.2.11.37 min10Amphibians and reptilesNCERT §4.2.11.4, §4.2.11.510 min 1 sim11Birds and mammalsNCERT §4.2.11.6, §4.2.11.7, Table 4.27 min12Chapter reviewMust-know facts, traps and formulas13 min