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 (A) Four (B) Three (C) Two (D) One

Tardigrade Admin · Accepted Answer

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

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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.

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

Four

Three

Two

One

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