Multiple choice

Which of the following statements is not correct?

  1. All sponges are exclusively marine.

  2. Amphiblastula is a landform of certain sponges.

  3. Calcareous and siliceous spicules are found in many sponges.

  4. All sponges are sessile.
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Sponges are not exclusively marine - some species like Spongilla are freshwater inhabitants. Option B contains a typo where 'landform' should be 'larval form' (amphiblastula is a larval stage). The other options are correct: sponges do have calcareous/siliceous spicules and are sessile.

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