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Theories of Biology

In: Science

Submitted By suelew
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Evolution by Natural Selection
The first theory that I will cover is the theory of evolution by natural selection, this theory has two parts. The first part deals with species, which over generations and time change or evolve from their original form. The second part to this theory is the mechanism that allows a species to change is called natural selection. ( Pruitt, N. L., & Underwood, L. S., 2006).
Inheritance
This theory says that traits can be passed down from generation to generation through genes. For example, I have dark, curly hair and dark eyes because my mother has light eyes and straight hair it could be said that I inherited these traits from my father who has curly, dark hair and dark eyes.
Cells
The theory of cells states that all living organisms are made up of cells. It also states that existing cells come from preexisting cells. ( Pruitt, N. L., & Underwood, L. S., 2006).
Biological Classification
The theory of biological classification, in the early stages, allows for organisms to be classified according to their differences and similarities. The theory of biological classification allows for organisms to be classified according to their differences and similarities. Years later, using the theory of evolution, biological classification group’s organisms by relations through ancestry. ( Pruitt, N. L., & Underwood, L. S., 2006).

Bioenergetics
The theory of bioenergetics uses the idea that the rules of life are run by the same riles of energy. This means that life needs energy to live.
Homeostasis
This theory states that while organisms can withstand various external conditions, they function with internal conditions that do not vary as often, internal conditions that stay within certain limits. Organisms will not function well when internal conditions vary too far outside their functional limits.
Ecosystems
The theory of ecosystems states that organisms interact with their environment as well as other organisms within their environment. This interaction is considered a biological community, within these community organisms to function or exist alone. Any drastic changes in this environment will cause a chain reaction of changes within said community. ( Pruitt, N. L., & Underwood, L. S., 2006).

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