How many from the following phylum has external fertilisation with indirect development?

{Porifera, Ctenophora, Echinodermata, Hemichordata}

Question

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

TestHub · Accepted Answer

External fertilisation with indirect development is present in aquatic animals which belongs to phylum $\to$ 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.

Botany - Animal Kingdom Question with Solution | TestHub

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