Osculum occurs in

Which type of cells are absent in sponges?

Assertion $(A)$: Animals are multicellular organisms composed of eukaryotic cells.
Reason $(R)$: Sponges do not perform photosynthesis and obtain nutrition by absorption.

In animals of the phylum Porifera,through which structure does excess water exit the body?

Amphiblastula is the larva of

Venus Flower Basket belongs to Phylum