Answer:
the Echinoderms.
Explanation:
Examples of echinoderms: starfish, sea urchin, feather stars and sea cucumbers.
Answer:
choloroplast is absent in prokaryotic cell but chlorophyll when arranged with protein molcules form light harvesting complex which is know as chorosome. the complex helps in carrying out photosynthesis in the cell
Mechanical energy can change into heat energy