Question

In Porifera, skeleton forming cells are
A. Amoebocytes
B. Thesocytes
C. Archaeocytes
D. Sclerocytes

Answer 1

Hint:- In zoology, a skeleton is any sufficiently rigid stable framework of an animal, regardless of whether it has joints or if it is biomineralized. In most sponges, mesohyl acts as an endoskeleton, and in soft sponges, it is the only skeleton that encrusts rough surfaces such as rocks.

Complete answer:-
The lowest multicellular animals belonging to the Animalia Kingdom are the Phylum Porifera. The term "Porifera" refers specifically to the pore bearers or species of pore bearing. Porifera are also called Sponges. Sponges are proven to be organisms based on embryological experiments and are categorised into a different phylum of animals. This phylum contains around 5000 species. Sponges have non-specialized cells that can turn into other forms, often migrating in the process between the main cell layers and the mesohyl. Nervous, digestive or circulatory systems do not exist in sponges. Instead, to receive food and oxygen and to eliminate waste, most rely on maintaining a steady water flow through their bodies. Mesohyl is stiffened most often by mineral spicules, spongin fibres, or both. The spicules form the body's skeleton, which gives protection. These spicules are formed by sclerocyte cells that are present in the mesenchyme.

Therefore the correct answer is ‘ Sclerocytes’.

Note:- Porifera's feeding process is very unique. The food gets digested into every cell individually. The Porifera needs flowing water to make sure the food will enter the bottom of the body. The waste will fall into the water from the surface of the body.