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

Which of the following statements about Arthropods is incorrect?

  1. They have chitinous exoskeleton.

  2. The body is segmented and is divisible into two or three regions.

  3. Body cavity is reduced in Arthropods.

  4. They have kidney like organs for excretion.

  5. There is an open circulatory system.
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

No, this statement is incorrect. They do not have kidney type organs for excretion.

Multiple choice

Which of the following is correct about the Phylum Porifera of the animalia kingdom?

  1. Porifera have pores called ostia over the body.

  2. The body of porifera is radially symmetrical.

  3. The body of Porifera bears tentacles supplied with special stinging cells.

  4. Reproduction in Porifera is only asexual by budding and gemules.

  5. Most Porifera are small cylindrical or round worms.
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

This is the correct answer.  Porifera have pores called ostia over the body with a single large opening called osculum on top. Animals of these phylum are known as sponges.

Multiple choice

Flatworms belong to the Phylum

  1. Coelenterata

  2. Platyhelminthes

  3. Annelida

  4. Arthropoda

  5. Vertebrata
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Flatworms belong to the Phylum Platyhelminthes. This is the correct answer.

Multiple choice

Mouth parts in cockroach are

  1. Cutting type

  2. Siphoning type

  3. Sponging type

  4. Cutting and biting type
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Mouth parts in cockroach are biting and chewing type.

Multiple choice

Which of the following statements is/are true? a. The movement of blood helps the earthworm to move forward. b. The earthworm’s body secretes a slimy substance, which helps in movement. c. Locomotion in earthworm is brought about by the relaxation and contraction of body muscles.

  1. Only a

  2. Only b

  3. Only c

  4. Only b and c

  5. All of these
Reveal answer Fill a bubble to check yourself
E Correct answer
Explanation

All the statements are correct. Circular and longitudinal muscle fibres are present on the body wall of the earthworm. The movement of these muscles pushes the blood in the direction of body movement. This movement of blood helps the animal move forward. The earthworm’s body secretes a slimy substance, which helps in movement. Locomotion in earthworm is brought about by the relaxation and contraction of body muscles.

Multiple choice

What kind of circulatory mechanism is found in hydra?

  1. Parenchymal circulation

  2. Water circulation

  3. Intracellular circulation

  4. Body-cavity circulation
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

In hydra, internal circulatory fluid is absent. Thus, it uses external medium (water) as circulatory fluid.