Structural Organisation in Animals

Structural Organisation in Animals

Moderate Questions
Difficult Questions

Advanced Zoology

Animal Kingdom
Structural Organisation in Animals
Digestion and Absorption
Breathing and Exchange of Gases
Body Fluids and Circulation
Excretory Products and their Elimination
Locomotion and Movement
Neural Control and Coordination
Chemical Coordination and Integration
Human Reproduction
Human Health and Disease
Biotechnology Principles and Processes
Biomolecules (Zoology)
Evolution (Zoology)
Biotechnology and its Applications
Reproductive Health
  1. Which one of the following correctly describes the location of some body parts in the earthworm Pheretima?








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    In Pheretima two pairs of testes sacs are situated in the 10th and 11th segments. Each testes sac of the 10th segment encloses a testes and a seminal funnel. Each testes sac of the 11th segment encloses a testes, a seminal vesicle and a seminal funnel.

    Correct Option: C

    In Pheretima two pairs of testes sacs are situated in the 10th and 11th segments. Each testes sac of the 10th segment encloses a testes and a seminal funnel. Each testes sac of the 11th segment encloses a testes, a seminal vesicle and a seminal funnel.

  1. If a live earthworm is pricked with a needle on it outer surface without damaging its gut, the fluid that comes out is:








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    If a live earthworm is pricked with a needle on its outer surface without damaging its gut, the fluid that comes out is coelomic fluid because coelomic fluid lies between body wall and alimentary canal. Earthworms are helpful to man as bait for fishing and loosen the soil for roots to grow as well. A earthworm’s wastes help to fertilize the soil.

    Correct Option: A

    If a live earthworm is pricked with a needle on its outer surface without damaging its gut, the fluid that comes out is coelomic fluid because coelomic fluid lies between body wall and alimentary canal. Earthworms are helpful to man as bait for fishing and loosen the soil for roots to grow as well. A earthworm’s wastes help to fertilize the soil.

  1. Which one of the following structures in Pheretima is correctly matched with its function?








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    Clitellum - secretes cocoon during breading season of earthworm. Gizzard is used for- grinding of food particles. Setae help in locomotion. Typhlosole increases the absorption area in intestine.

    Correct Option: A

    Clitellum - secretes cocoon during breading season of earthworm. Gizzard is used for- grinding of food particles. Setae help in locomotion. Typhlosole increases the absorption area in intestine.

  1. Consider the following four statements (A-D) related to the common frog Rana tigrina, and select the correct option stating which ones are true (T) and which ones are false (F) Statements:
    (a) On dry land it would die due to lack of O2 its mouth is forcibly kept closed for a few days
    (b) It has four- chambered heart
    (c) On dry land it turns uricotelic from ureotelic
    (d) Its life-history is carried out in pond water Options:








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    (A) Dry skin causes ceased cutaneous respiration
    (B) Three chambered heart.
    (C) Frog never becomes uricotelic
    (D) External fertilization occurs in water

    Correct Option: A

    (A) Dry skin causes ceased cutaneous respiration
    (B) Three chambered heart.
    (C) Frog never becomes uricotelic
    (D) External fertilization occurs in water

  1. One very special feature in the earthworm Pheretima is that








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    The intestine of an earthworm has a peculiar fold of tissue that forms a pocket in the intestine that is visible when viewing a cross section. This space, which runs almost the whole length of the body dorsally is known as the typhlosole and it serves to increase the surface area of the intestine for absorption.

    Correct Option: B

    The intestine of an earthworm has a peculiar fold of tissue that forms a pocket in the intestine that is visible when viewing a cross section. This space, which runs almost the whole length of the body dorsally is known as the typhlosole and it serves to increase the surface area of the intestine for absorption.