Question

Match the Column I (Animals) with Column II (Respiratory organs) {|c|l|c|l|} Column I (Animals) & & Column II (Respiratory organs) &
i. & Sponges & a. & External gills
ii. & Insects & b. & Plasma membrane
iii. & Limulus & c. & Tracheae
iv. & Amphibian tadpoles & d. & Book gills
Select the correct option

• A. i - b ii - c iii - d iv - a
• B. i - b ii - c iii - a iv - d
• C. i - c ii - b iii - d iv - a
• D. i - c ii - b iii - a iv - d

Hint:

- Sponges: diffusion only - Insects: tracheae - Limulus: book gills - Tadpoles: external gills

Answer 1

The Correct Option is A

Concept:
Different organisms use different respiratory structures:
• Sponges: Gas exchange occurs by diffusion through body surface (plasma membrane)
• Insects: Respiration through tracheal system
• Limulus (king crab): Uses book gills
• Amphibian tadpoles: Respire through external gills

Step 1: Match each organism.

• i (Sponges) $\rightarrow$ b (Plasma membrane)
• ii (Insects) $\rightarrow$ c (Tracheae)
• iii (Limulus) $\rightarrow$ d (Book gills)
• iv (Amphibian tadpoles) $\rightarrow$ a (External gills)

Step 2: Write final matching.}
\[ i-b,\quad ii-c,\quad iii-d,\quad iv-a \]