Multiple choice

Which among these do/does not utilise the trapped air present in the gaps of soil?

  1. Nematode

  2. Bacteria

  3. Termite

  4. Earthworm

  5. Starfish
Reveal answer Fill a bubble to check yourself
E Correct answer
Explanation

Starfish breathe by absorbing oxygen from special finger-like structures that are found on their body surface. They contain fuzzy patches which perform the same function of gills. Each one of those patches can contain dozens of papulae which are extended when the animal is comfortable and feels secure. Each of these permits the animal to collect oxygen for the starfish to breathe. They are generally found only on the top and side surfaces, generally not on the underside.

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