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Lecture

Intro Biology 111

2 Pages
159 Views

Department
Biology (Sci)
Course Code
BIOL 111
Professor
Irene Gregory- Eaves

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Description
01/09/12 What is life: Biology: Bio – Logos Life – Reason Atom  cell  tissue  organism  population  community  ecosystem 1. Energy transformation - Metabolism ATP  cellular respiration Light, inorganics (H2, H2S), organics (carbs, lipids) 2. Reproduction asexual – no gamete union, little to no genetic difference sexual – gamete union, genetic differences between parents and spawn 3. Homeostasis adaptations enable to life to respond to changes in environment Diversity of life - Evolution drives diversity in life - All life has common ancestry Readings: p.1-10 Biology: - study of living things - descended from single-celled ancestor 3.8 billion years ago - share many characteristics: - made of cells containing genes - use genes to reproduce and evolve - convert enviro molecs into new bio molecs for energy - homeostasis 1. Living organisms consist of cells - unicellular: one cell - multicellular: more specialized cells for diff functions - Zaccharias/Hans Janssen = microscope (1590)  discovery of cells - Leeuwenhoek: pond water has unicellular organisms - Hooke: plant tissues = repeated units, cells - Schleiden/Schwann (1838) cell theory: - Cells basis of structural/physiological units of organisms - Cells are both distinct things and building blocks for complex shit - self-assembled life through non-living components - Pasteur disproved spontaneous generation - germ theory, explained fermentation by bacteria, pasteurization 01/09/12 -
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