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Intro to Biology

An introduction to the study of life

Evan McManus

on 26 March 2013

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Transcript of Intro to Biology

Intro to Biology What is Life? Google Definition: The condition that distinguishes animals and plants from inorganic matter, including the capacity for growth, reproduction, functional activity, and continual change preceding death The Hierarchy Biosphere > Ecosystem > Community > Population > Organism > Organ System > Organ > Tissue > Cell > Organelle > Molecule > Atom There are three domains of life:
I. Bacteria
II. Archaea
III. Eukayra Evolution Science and Technology in Life Today Science and technology today are being used for various reasons not only to help with our knowledge of biology but also with situations in peoples lives. Such as crime scene investigation. Technology has also aided researchers who study genomics DNA and Genes DNA is the cells genetic material. Genes are the units of inheritance. DNA is the substance of genes. Genome is all of the genetic information inherited by an organism. All of this together is the reason why we are who we are Biosphere Ecosystem Community Population Organisms Organs and Organ Systems Tissues Cells Organelles Molecules All living things in a particular area and all the nonliving things those organisms interact with All the different populations of species inhabiting a particular area All the individuals of a species living in a particular area Individual living things Specialized part of the organism and they make up a system that work together to perform body functions Made up of a group of cells that have the same function Life's fundamental structure Various functional components in cells Chemical structure consisting of two or more atoms (small chemical units) The entire portion of Earth inhabited by life Domains of Life Bacteria and Archaea Eukarya Natural Selection Diversity The change and transformation of life on Earth over time. It is the fundamental principle of biology. Evolution illuminates both the similarities and the differences in the world of life There are an estimated 10 million to 100 million species. Biologists classify species into a group and then are combined into larger groups. Life is not only diverse but it is also unified Term made by Charles Darwin that defines how individuals survive because of their traits and are able to spread those traits through reproduction. While other traits that don't help survival of that individual are reduced They both include multiple kingdoms of life. Bacteria is the most diverse and widespread. Archaea live in Earth's most extreme environments Includes three kingdoms:
1. Plantae: Organisms that carry out photosynthesis
2. Fungi: Defined by the nutritional mode of absorbing food outside of its body
3. Animalia: Organisms that ingest other organisms
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