Algae and nitrogen-fixing bacteria are photosynthetic organisms.
D,E,G is the correct answer
The digestive system breaks down food, the respiratory system takes in oxygen, and the cardiovascular system delivers the oxygen and food to the cells.
Answer:
The organisms in this trophic level break down all the nutrients in the bodies of plants and animals and return them to the soil to be absorbed and used by plants. ... The second is the ecological niche, which encompasses the particular location occupied by an organism and its functional role in the community.
The sugar is the solute. The water would be the solvent.
