Multiple choice

Which of the following are exclusively freshwater sponges?

  1. Euplectella and spongilla

  2. Hyalonema and euplectella

  3. Leucosolenia and sycon

  4. Ephydatia and spongilla

  5. Only sycon
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Correct answer. Both are freshwater sponges. Phylum porifera consists of mainly marine animals living in deep seas but few species are also found in freshwaters e.g. spongilla. Marine animals/sponges belong to classes Calcarea and Hexactinellida while fresh water sponges are placed in class Demospongiae.

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