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 - study of ocean plants and animals and their ecological relationships Medicine - the science which relates to the prevention, cure, or alleviation of disease. Microbiology - the branch of biology that deals with microorganisms and their effects on other living organisms Molecular Biology - the branch of biology that deals with the formation, structure, and function of macromolecules essential to life, such as nucleic acids and proteins, and especially with their role in cell replication and the transmission of genetic information