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.
Plants emit oxygen when breathing while animals breathe out carbon dioxide. For reproduction, plants use asexual and sexual methods while animals undergo sexual reproduction. In terms of composition, plants have cell walls and animals donât. Plants make their own food while animals hunt or get their food. Both plants and animals have external needs in order to live and survive. They are designed their own way for them to adapt to certain environmental changes and defend themselves from harm. These are also very important for manâs survival. They contain protein for strong bone, body and teeth.