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 is an insect?

  1. Moth

  2. Mites

  3. Prawn

  4. Scorpion

  5. None of these
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Moths comprise a group of insects related to butterflies, belonging to the order Lepidoptera.

Multiple choice

Complete metamorphosis is found in

  1. housefly and mosquito

  2. housefly and cockroach

  3. mosquito and cockroach

  4. Both (1) and (2)

  5. None of the above
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Complete metamorphosis is found in housefly and mosquito. 

Multiple choice

Common feature in earthworm and cockroach is:

  1. nephridia

  2. solid and ventral nerve cord

  3. cuticle (exoskeleton)

  4. Malpighian tubules

  5. None of the above
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Common feature in earthworm and cockroach is the presence of cuticle or exoskeleton on the body surface.

Multiple choice

In Ascaris, 3rd moulting takes place in:

  1. lung

  2. small intestine

  3. liver

  4. egg

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

From the lung alveoli, the larvae of ascaris crawl up the bronchi and trachea that is aided by the current caused by the ciliated epithelium of the respiratory tract and are propelled into the larynx. The larvae leave the respiratory tract by means of cough and once more get swallowed. The larvae then pass down through esophagus to the stomach and localise in the upper part of the small intestine. Another moulting occurs between 25th to 29th days of infection.

Multiple choice

Which of the following species of earthworm is used in vermicomposting?

  1. Lumbricus terrestres

  2. Eisenia fetida

  3. Arctiostrotus vancouverensis

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

Eisenia fetida, commonly called the red wiggler or manure worm, is the standard species used in vermicomposting due to its rapid reproduction rate, efficient organic matter processing, and tolerance to the composting environment.

Multiple choice

What is the storage structure of a cockroach called?

  1. Gizzard

  2. Haemocoel

  3. Cardia

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

These are storage structures of a cockroach. The haemocoel consists of a large number of fat bodies which are fat cells having fat globules, protein granules and glycogen.

Multiple choice

Stages in the life cycle of a butterfly are given below. Find their correct order.

Butterfly, Pupa, Egg, Caterpillar

  1. Pupa, Egg, Caterpillar, Butterfly

  2. Caterpillar, Pupa, Egg, Butterfly

  3. Egg, Caterpillar, Pupa, Butterfly

  4. Egg, Pupa, Caterpillar, Butterfly
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

In the first stage, a female butterfly lays eggs. The second stage is a caterpillar. A caterpillar is sometimes called larva. Larva grows into a pupa which finally forms adult butterfly.

Multiple choice

Flatworms are _________ animals with organ level of organisation.

  1. radially symmetrical, diploblastic and coelomate

  2. radially symmetrical, diploblastic and acoelomate

  3. radially symmetrical, triploblastic and acoelomate

  4. bilaterally symmetrical, diploblastic and coelomate

  5. bilaterally symmetrical, triploblastic and acoelomate
Reveal answer Fill a bubble to check yourself
E Correct answer
Explanation

Correct answer. Flatworms are bilaterally symmetrical, triploblastic and acoelomate animals with organ level of organisation.