Section 1 - Section 1: Biology and Matter Biology as a...

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Section 1: Biology and Matter Biology as a science Biology is the scientific study of life with the interaction of the living and nonliving environment. Cells are alive but gases, tables, books and viruses are not. The word science come from a Latin verb that means to know and emerges from the curiosity of our scientists about the world around us. In science we have laws, hypothesis, and theories. A law is principles that are universal because they will not change with distance or time. Hypothesis is an educated guess based in observation, evidence and clues and for that reason is considered a supposition supported on previous observation. Theory is made after a lot of experiments to confirm (true or false) a hypothesis many times and therefore is more general and reliable than a hypothesis. Natural Causality is when events can be trace to natural causes that are potentially within our ability to comprehend. Life Life is highly organized and has a hierarchy of structural levels. A common ancestor connects these levels. Some properties of life are: order, reproduction, growth and development, energy utilization, response to the environment, homeostasis, and evolutionary adaptation. Living creatures are organized in the exterior and in the interior. They can reproduce creating living individuals similar to themselves. Something that is alive can grow and develop or for example they can go from a baby (less cells) to an adult (much more cells) in a certain amount of time. A description of using energy is the capacity to do work. In life an example of using energy is to eat food and perform different tasks like moving to a specific place. An illustration of responding to the environment is that if something that is alive feel that the surroundings are toxic then will not go in that direction. Homeostasis means that inside each living thing there is balance with the outside world. The internal environment of cells is maintained within tolerable limits therefore creating a constant environment. Organisms can go through evolution or evolutionary adaptation as time goes by because then they can change (mutate) and adapt to the environment to continue living. If these creatures are not adapting they become extinct. Charles Darwin (1809-1882) talked a lot about evolution. He said that the survival of characteristics in a population really depends on competition between the members of the same species. In this way creatures with very good traits for the environment they are living in will increase the chances of producing more offspring with those same traits.
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Evolution is the theory that explains the origin of diverse forms of life as a result of mutation
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This note was uploaded on 04/10/2011 for the course BIO 2353 taught by Professor Horne during the Spring '08 term at Houston Baptist.

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Section 1 - Section 1: Biology and Matter Biology as a...

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