BIO 309D - Chapter 1: pages 2-4, 5-6 Chapter 2: pages 15-34...

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Unformatted text preview: Chapter 1: pages 2-4, 5-6 Chapter 2: pages 15-34 Readings: Chapter 3 pg 38-59 Reading: Ch 4 p. 63-76 Chapter 19: pages 406, 407-412 Chapter 21a: pages 469-474 Characteristics of living organisms Contain biomolecules - carbohydrates, lipids, proteins, nucleic acids (DNA and RNA) Composed of cells - smallest unit of life - red blood cells- disks - white blood cells- sphere Respond to environment - ex- chameleon sees and catches its prey Maintain homeostasis - stay the same, maintain stable in internal environment Acquire and use materials and energy - we get energy from food we eat - raw materials for maintaence, repair and growth of their bodies Reproduce R- all reproduce their own kind Capacity to evolve - have adaptive traits h Hierarchical organization of life Subatomic particles (protons, electrons, neutrons) Atom- units of matter that cannot be broken down into simpler substances by an ordinary chemical means Molecule- chemical component of cells Cell- smallest unit of life Tissue- group of similar cells that perform the same function Organ- group of 2 or more tissues together to perform a function Organ system- at least 2 organs working together to perform function Multicellular organism/individual- single organism Population- all individuals of the same species in an area Community- all species in an ecosystem that can interact Ecosystem- community and physical enviroment Biosphere- all part of earth that supports life All forms of matter are made up of Atoms. They are the building blocks matter. They are composed of subatomic particles. Particles Proton: Positive charge, +1, mass of 1, found in the nucleus Neutron: No Charge , Neutral, Mass of 1, found in nucleus Electron: Negative charge, -1, Mass of 0, found in electron cloud Elements- An element is a form of matter containing only one kind of atom.- Atoms of the different elements differ in their number of subatomic particles.- Atomic Number: # of protons in nucleus.-protons and electrons equal-proton number always constant, number of neutrons may vary- Different atomic masses: # of protons + # of neutrons- Isotope atoms of the same elements that differ in the number of neutrons, same atomic number- There are 25 essential elements for humans. There are 11 major essential elements. - Oxygen, Hydrogen, Carbon, and Nitrogen make 97% of everything. Isotopes- 12C (6 protons, 6 neutrons), 13C (6 protons, 7 neutrons), 14C (6 protons, 8 neutrons) (Carbon is 6) Chemical Bonds- Atoms may combine to form compounds and/or molecules....
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This note was uploaded on 04/07/2008 for the course BIO 309D taught by Professor Jessicawandelt during the Spring '08 term at University of Texas at Austin.

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BIO 309D - Chapter 1: pages 2-4, 5-6 Chapter 2: pages 15-34...

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