Biology

Invertebrate Zoology

799 Questions

Invertebrate zoology covers the anatomical and physiological characteristics of animals without backbones, focusing heavily on insects, earthworms, and other arthropods. These questions explore structural components like respiratory organs and excretory systems. This topic forms a crucial part of the biology section in various competitive exams.

Cockroach anatomyEarthworm organsInsect ordersRespiratory organsExcretory organs

Invertebrate Zoology Questions

Multiple choice

Intracellular digestion is found in

  1. Frog

  2. Amoeba

  3. Fish

  4. Sponge
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Amoeba performs intracellular digestion within food vacuoles, where enzymes break down food particles inside the cell. Unlike sponge (which uses intracellular digestion but is a simple organism), frog and fish rely on extracellular digestion in specialized digestive tracts.

Multiple choice

Which of the following organisms is called as ‘friend of farmers’?

  1. Earthworm

  2. Leech

  3. Sycon

  4. Ascaris
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

 Earthworms are known as friends of farmers since they further turn and loosen the soil. Like microbes,they also add humus to it by decomposing the dead plants and animals in the soil. Humus is a storehouse of essential plant nutrients.

Multiple choice

Spiracles and trachea are found in ___________.

  1. earthworm

  2. cockroach

  3. plants

  4. fishes

  5. none of these
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Yes, cockroach and other insects breathe through spiracles and tracheae. There is a network of hollow tubes running through the body of an insect. These hollow tubes are called trachea. Each trachea opens on the body surface in the form of very small pores. These pores are called spiracles.

Multiple choice

By which method does Amoeba engulf food from environment?

  1. Diffusion

  2. Osmosis

  3. Endocytosis

  4. Plasmolysis

Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Amoeba engulfs food through endocytosis, specifically phagocytosis, where the cell membrane extends around the food particle and envelops it. Diffusion and osmosis involve passive movement of molecules, while plasmolysis is water loss from plant cells.

Multiple choice

Which of the following statements is/are false?

a. An earthworm's body is divided into more than hundred similar short segments. b. In an earthworm, there are two pairs of testes present in the 12th and 13th segments. c. An earthworms first body segment, that contains the mouth, is called the peristomium.

  1. Only a

  2. Only a and b

  3. Only b

  4. Only b and c

  5. Only c
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

This is the correct option as this statement is false. In an earthworm, there are two pairs of testes present in the 10th and 11th segments.

Multiple choice

Which is the correct sequence of stages of life cycle of mosquito?

  1. Egg, Larva, Pupa, Adult

  2. Egg, Pupa, Larva, Adult

  3. Pupa, Egg, Larva, Adult

  4. Egg, Tadpole, Pupa, Adult

  5. Egg, Pupa, Larvae, Anopheles
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Larva is the stage when they have well develop head and mouth with thorax. Pupa is the stage when they are well developed that they can swim in the water.