Answer
According to modern system of classification all living organism come under the category of super kingdom known as domain.
Classification of domain
Domain is classified into three main category. these are:
1. Archaea
Archaea include prokaryotes bur differ from bacteria as archea plasma membrane include different tpes of lipids. Cell wall of archaea have no peptidoglycan and also contain different types of RNA.
2. Bacteria
It also include single cell prokaryotes but differ from archaea ob the basis of cell wall composition, RNA and lipids present in plasma membrane.
3. Eukarya
It include all eukaryotes which are unicellular as well multicultural.
Conclusion
Thus is is confirmed that multicellular photosynthetic organisms come under the category of Eukarya.
