In which organisms these structures are found and what is their role?

In which organisms these structures are found and what is their role?
(i) Paramylon (ii) Pseudoplasmodia (iii) Heterocysts

(i) Paramylon These are found in euglenoids. These are the products of photosynthesis which can be stored in the cytoplasm.
(ii) Pseudoplasmodia These are found in slime moulds. Pseudoplasmodia are formed when the food supply of the medium is exhausted.
(iii) Heterocysts Present in cyanobacteria. They are the sites of nitrogen fixation.