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

Book-lungs are the respiratory organs of a

  1. scorpion

  2. prawn

  3. snail

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

 Book-lungs are the respiratory organs of a scorpion.Each of these organs is found inside an open ventral abdominal, air-filled cavity (atrium) and connects with the surroundings through a small opening for the purpose of respiration.

Multiple choice

The structure 'typhlosole' in earthworms is used for

  1. crushing food

  2. slowing down passage of food

  3. increasing the absorptive area

  4. extra secretion of digestive enzymes
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

The structure 'typhlosole' in earthworms is used for increasing the absorptive surface area.

Multiple choice

The circulatory system of a cockroach is

  1. closed

  2. open

  3. simple

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

An open circulatory system is a system in which a fluid in a cavity called the hemocoel bathes the organs directly with oxygen and nutrients.

Multiple choice

Which of the following has a closed type of circulatory system?

  1. Cockroach

  2. Fish

  3. Scorpion

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

Fish have a closed circulatory system where blood flows through vessels throughout the body. Cockroaches, scorpions, and Limulus (horseshoe crabs) are arthropods with open circulatory systems where hemolymph bathes tissues directly in sinuses.

Multiple choice

Where does pinworm live in humans?

  1. Liver

  2. Pancreas

  3. Intestine

  4. Mouth
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Pinworms (Enterobius vermicularis) are intestinal parasites that inhabit the human digestive tract, specifically the cecum, appendix, and adjacent areas of the large intestine. They do not live in the liver, pancreas, or mouth. The adult worms live in the intestine, and their eggs are deposited around the anal region, which is how the infection spreads.