Multiple choice

Match the following:

 
a. Coelenterates and flatworms 1. They use special vascularised structures called gills.
b. Earthworms 2. They use the method of simple diffusion over their entire body surface.
c. Aquatic arthropods like fish 3. They use a moist cuticle for exchanging gases.

  1. a - 2, b - 1, c - 3

  2. a - 2, b - 3, c - 1

  3. a - 3, b - 2, c - 1

  4. a - 1, b - 2, c - 3

  5. a - 1, b - 3, c - 2
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

This is the correct option. Coelenterates and flatworms use simple diffusion over their entire body surface for the exchange of gases. Earthworms use a moist cuticle for the exchange of gases. Aquatic arthropods like fish use special vascularised structures called gills for the exchange of gases.

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