In the latter case the resistance is caused by dissipation of mechanical energy when the configuration or the direction of flow is sharply changed, by the formation of vortices and secondary flows as a result of the flow breaking away, by the centrifugal forces, etc.
Animals depend on plants for food as plants produce food and energy which animals can't, so, herbivores eat plants to get energy, carnivores eat herbivores and other carnivores for energy and omnivores eat all four, plants, herbivores, carnivores and also other omnivores for energy.
Best Answer: Animals has legs, enabling them to search high and low for food, thus they do not need chloroplasts. Plants are still. they can only move with the direction of sunlight. thus, they need chloroplast to absorb the sunlight to convert into chemical energy to make food for their survival.