A food chain symbolizes the path of energy within an ecosystem: Primary producers such as green plants translate solar energy into carbohydrates, which are then tapped by primary and secondary consumers and ultimately recycled by decomposers. Each tier represents a different *trophic* level.
Marine biology. Marine biology is the scientific study of the plants, animals, and other organisms that live in the ocean. Given that in biology many phyla, families and genera have some species that live in the sea and others that live on land, marine biology classifies species based on the environment rather than on taxonomy.
Marine Biology is a field of biology, and studying this field can be effective preparation for students wishing to pursue careers in health sciences. Some Marine Biologists wish to work with the care of animals through Veterinary Medicine, while others go on to work with human health.