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NTA Abhyas NEET2020BotanyAnimal KingdomPractice

How many from the following phylum has external fertilisation with indirect development? Porifera, Ctenophora, Echinodermata, Hemichordata

Options

  1. AFour
  2. BThree
  3. CTwo
  4. DOne

Correct answer

B. Three

Step-by-step solution

External fertilisation with indirect development is present in aquatic animals which belongs to phylum → Ctenophora with cydipidd larva, Echinodermata with the different larva and Hemichordata with tornaria larva. In Porifera, fertilisation is internal and development is indirect having a larval stage which is morphologically distinct from the adult.

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