The below mentioned article provides a diagram of amphiblastula (larva). 1. It is a free swimming larval stage of Sycon and many other calcareous sponges. 2. The body is some what ovoid in form and is comprised of an anterior half of small flagellated micromere cells and a posterior half of large non-flagellated macromere cells. 3. It encloses a small [...]
In this article we will discuss about the structure of noctiluca. This will also help you to draw the structure and diagram of noctiluca. 1. Marine and pelagic form abundantly found near sea shore and imparting reddish colour to sea water in day. 2. Body round and somewhat ball like. 3. Body enclosed in a smooth cellulose envelope which shows [...]
In this article we will discuss about the spicules and gemmule of sponge. Spicules of Sponge: 1. The spicules are structures which form the supporting skeleton in sponges. 2. They may be either calcareous or silicious in nature. 3. They may be either monaxon (having one ray) triaxon (having 3 rays) or tetraxon (having 4 rays). 4. Some times they [...]