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TGBIE · 1st Year · BiPC

Zoology — Important Questions

High-frequency SAQ and LAQ questions from TS Inter 1st Year Zoology — all 8 units based on TGBIE Annual Plan 2025-26.

Unit I & II: Diversity and Structural Organization

  1. 1Explain the basis of biological classification. What are the five criteria used in modern classification?
  2. 2What is biodiversity? Explain the types of biodiversity — genetic, species, and ecosystem diversity.
  3. 3Describe the levels of organisation in animals from cellular to organ system level.
  4. 4Explain the significance of coelom. What are acoelomates, pseudocoelomates, and eucoelomates?

Unit III: Invertebrate Phyla — Important Questions

  1. 1Describe the general characters of Phylum Porifera. Explain canal system in sponges.
  2. 2Describe the general characters of Phylum Platyhelminthes. Give two examples and their economic importance.
  3. 3Describe the general characters of Phylum Annelida. Write a brief account of the earthworm.
  4. 4Describe the general characters of Phylum Arthropoda. Why is it the largest phylum?
  5. 5Describe the general characters of Phylum Mollusca. Give two examples.

Unit IV: Phylum Chordata — Important Questions

  1. 1What are the fundamental characters of Phylum Chordata? Describe the three groups of Acraniata.
  2. 2Describe the general characters of Class Amphibia with special reference to the frog.
  3. 3Distinguish between Chondrichthyes (cartilaginous fish) and Osteichthyes (bony fish) with examples.
  4. 4What are the distinguishing features of Class Mammalia? Give four examples of different orders.

Unit V: Locomotion in Protozoa — Important Questions

  1. 1Describe the structure and working of a flagellum. How does Euglena move by flagellar movement?
  2. 2Explain the mechanism of ciliary movement in Paramecium. What are effective and recovery strokes?
  3. 3Describe binary fission in Paramecium and Euglena. How do they differ?

Unit VI: Biology and Human Welfare — Important Questions

  1. 1Explain the life cycle of Plasmodium vivax. What are the clinical symptoms of malaria?
  2. 2Describe the life cycle of Ascaris lumbricoides (roundworm). How does it cause disease?
  3. 3Describe the pathogenicity, transmission, and prevention of Typhoid fever.
  4. 4Explain the ill-effects of tobacco, alcohol, and drugs on human health.

Unit VII: Periplaneta Americana — Important Questions (LAQ)

  1. 1Describe the external morphology of Periplaneta americana (cockroach) with a labelled diagram.
  2. 2Describe the digestive system of Periplaneta americana with a neat diagram.
  3. 3Describe the nervous system of Periplaneta americana. What is an Ommatidium?
  4. 4Describe the reproductive system of male Periplaneta americana.
  5. 5Describe the respiratory system and circulatory system (haemocoel) of Periplaneta americana.

Unit VIII: Ecology — Important Questions

  1. 1Define ecosystem. Explain the components of a lake ecosystem (aquatic ecosystem).
  2. 2Explain food chains and food webs. What are ecological pyramids? Describe pyramids of number, biomass, and energy.
  3. 3Explain the carbon cycle and nitrogen cycle with neat diagrams.
  4. 4What are population attributes? Explain population growth (J-curve and S-curve).
  5. 5Explain the causes and effects of air pollution. How can it be controlled?
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