Here is an excerpt from a wikipedia article regarding the different branches of biological sciences:

Biology (from Greek: βίος, bio, “life”; and λόγος, logos, “knowledge”) is the study of life. It is a field of empirical science that examines the structure, function, growth, origin, evolution, and distribution of living things both past and present. It classifies and describes the various forms of organisms, how organisms function, how species come into existence, and the interactions they have with each other and with the natural environment. Biology includes a broad spectrum of fields that address phenomena related to living organisms (biological phenomena), including botany, zoology and physiology.

A vast field, biology encompasses a large number of highly specialized disciplines. Traditionally, the specific fields within biology are very broadly grouped by the basic type of organisms being studied:

botany, the study of plants:

zoology, the study of animals, and

microbiology, the study of microorganisms.

The fields within biology are further divided based on the scale at which organisms are studied and the methods used to study them:

biochemistry examines the fundamental chemistry of life;

cellular biology examines the basic building block of all life, the cell;

physiology examines the physical and chemical functions of the tissues and organ systems of an organism; and

ecology examines how various organisms interrelate.

In addition to all of the basic groupings and specialized fields within biology, many applied fields of biology such as medicine and genetic research are more complex and involve many additional specialized sub-disciplines.

Biology as a unified science was first developed in the nineteenth century, as scientists discovered that all living things shared certain fundamental characteristics and were best studied as a whole. Today, biology is a standard subject of instruction at schools and universities around the world, and over a million papers are published annually in a wide array of biology and medicine journals.[1]

For the rest of this article and more information you can see it at http://en.wikipedia.org/wiki/Biological_science

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The Earth Sciences Geology: The science of the origin, history, and structure of the Earth, and the physical, chemical, and biological changes that it has experienced or is experiencing. Oceanography: The exploration and study of the ocean. Paleontology: The science of the forms of life that existed in prehistoric or geologic periods. Meterology: The science that deals with the atmosphere and its phenomena, such as weather and climate. The Life Sciences (Biology) Botany: The study of plants. Zoology: The science that covers animals and animal life. Genetics: The study of heredity. Medicine: The science of diagnosing, treating, and preventing illness, disease, and injury.

wow…another two points for me…thanks

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