Question

Given below are four matching of animal and its kind, of respiratory organ

I.	Silverfish	trachea
II.	Scorpion	Book Lung
III.	Sea Squirt	Pharyngeal slits
IV.	Dolphin	Skin

Which of them is true:
A) II and IV
B) III and IV
C) I and V
D) I, II and III

Answer 1

Hint: Respiration is the movement of oxygen from the outside environment to the cells within tissues , and transport the carbon dioxide in the opposite direction.

Complete answer:
- Silver fish is a small, wingless insect in the order Thysanura and they respire by trachea. A book lung is a type in many arachnids, such as scorpions and spiders.
- Sea squirt is a class in the subphylum Tunicata of sacs like marine invertebrate filter feeders and they respire by pharyngeal gills.
- Dolphins breathe using a single blowhole located at the top of their heads. A muscular flap covers the blow hole, allowing a dolphin to hold its breath under water and preventing water from filling its lungs.
- In the given options, as from the above explanation it is concluded that Silver fish breathe through trachea, Scorpion respire through book lung and Sea squirt breadth through pharyngeal gills.

Thus, the correct option is D.

Note: Respiratory organs are the organs which help to exchange gases within the organism. Every class of animals has different organs to breath based on their adaption.