<em>The periwinkle snails feed on plants. Consequently, they are said to herbivorous and heterotrophic since they cannot manufacture their own foods. They are also referred to as primary consumers because they directly feed on plants without any other nutritional option. They, therefore, occupy the second trophic level on a typical food web. </em>
The chloroplast is found only in plant cells. it is the organelle that conducts photosynthesis, but mitochondria are known as the PowerHouse of the cell, and store energy.
