Question

Given below are animals and its respiratory organs.
A. Silver fish- trachea
B. Scorpion- book lung
C. Sea squirt- Pharyngeal gills
D. Dolphin- skin
The correct matching options among the following are
A) A and D
B) A, B and C
C) B and D
D) C and D

Answer 1

Mechanisms of breathing vary among different groups of animals depending mainly on their habitats and levels of organisation.

Complete answer:
Lower invertebrates such as sponges, coelenterates, flatworms, etc., respire through simple diffusion across their whole body surface. Earthworms use their moist cuticle to respire while insects respire with the help of a network of tubes called tracheal tubes for transporting atmospheric air in the body. The majority of marine arthropods and molluscs use unique vascularized structures called gills for respiration, which is known as branchial respiration, while terrestrial forms use vascularized bags called lungs to exchange gases.

Silver fish is an insect that breathes by trachea. Book lung is a type of respiratory organ found in some arthropods like scorpions and spiders. Each book lung consists of a collection of thin plates, which are highly vascular and arranged in relation to each other, like the pages of a book. Sea Squirts are filter feeders that draw water and filter the tiny plankton into their pharynx. Dolphins are mammals with lungs for breathing. They draw in air through the blowholes that are on the top of their heads.

Thus, the correct answer is option B i.e., A, B and C

Note: Among vertebrates, fish use gills, while amphibians, reptiles, birds and mammals breathe through the lungs. Amphibians like frogs can also breathe through their wet skin (cutaneous respiration).