August 26, 2015Professor StackLIFE 102Intro to BiologyScience/Biology- Biology is the scientific study of life- Science= Latin “to know”- Science is based on datao Senses Datao Reasoning based on data UnderstandingDefinition of Life1. All living systems show evolutionary adaption2. Living systems show order/arrangements3. Regulation (homeostasis) within an organism4. Energy processing5. Growth (make more protoplasm*)6. Reproduction7. Respond to the environment - Ranges from atoms to the whole Eartho More emergent properties the bigger you getAtom- Lowest unit in living systems- Electron Microscope: used to see very very small atoms- Electron: different numbers and positions on the outside of the nucleus- Nucleus: made up of protons and neutrons o Varies atom to atom*living “stuff”** Conversion of light into energy ***touch each otherAugust 26, 2015Professor StackLIFE 102Molecule- Accumulation of atoms held together by chemical bonds- Has inertia properties not possessed by the atoms it is comprised of- Atomic force microscopy is used to molecules Units for Atoms and Molecules- Angstrom (10^-10 meters)- Nanometer (10^-9 meters)Organelle- Within a cell- Made of molecules- Ie. Chloroplast (emergent property is photosynthesis**)Cells- Fundamental unit of life- Show all characteristics of life- Smallest unit of life- Seen by microscopes- In multi-cellular organisms, each cell has its own “job”Tissue- Comprised of cells that are the same and contiguous ***- Ie. Mesoderm (spongy mesophyll that carry out photosynthesis in a leaf’s tissue)- Can be viewed by the naked eye*living “stuff”** Conversion of light into energy ***touch each otherAugust 26, 2015Professor StackLIFE 102Organ- Made of tissue (2 or more)- Multicellular organism that has one function- Ie. Leaf (carries out photosynthesis for the plant)Organism- Individual living thing- Multicellular organisms have organs, tissues, and cells- Categorized into species organized by similar characteristicsPopulations- Consists of one species in a similar locationCommunities- Populations of multiple species in a similar areaEcosystem- Community & the inorganic elements in the area (ie. River, air, etc.)Biosphere- All the ecosystem of the Earth- Extends into atmosphere and into the EarthWhat is a Cell?- Surrounded by a membrane- Have deoxyribonucleic acid (DNA)- All cells grow and reproduce by division- Prokaryotic Cell: no nucleus, no organelleso Contains DNA &membrane*living “stuff”** Conversion of light into energy ***touch each otherAugust 26, 2015Professor StackLIFE 102o Tend to be smaller that eukaryotes- Eukaryotic Cell: true nucleuso Membrane bound organelleo Ie. Ameoba*living “stuff”** Conversion of light into energy ***touch each
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