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.
Why do animals depend on plants. Plants give animals the food and shelter they need. Herbivores, which are plant eating animals, rely on plants to provide them with a regular source of food. They also provide shelter to may animals, both large and small.
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.