Tarleton Biology 1406 Final

Tarleton Biology 1406 Final What are Criteria of Life? - An ability to: 1. Reproduce 2. Grow and develop 3. Respond to stimuli (any change in environment) 4. Process energy 5. Regulate internal environment 6. Accumulate adaptations The 3 domains - archaea, eukarya, bacteria the levels of biology - Biosphere, ecosystems, communities, species, populations, organisms, organ system organ, tissues, cells, organelles, molecules and atoms law - a general statement based on repeated observations that can be used to predict future operations theory - A higher-level explanation of many observations and laws, consistent with all available evidence, and regarded as fact by the scientific community hypothesis - a falsifiable explanation specific to a biological question What is the driving force of chemical bonds and which electrons are involved? - electronegativity using valence electrons Ionic bonds - involve the transfer of valence shell electrons from one atom to another nonpolar covalent bonds - equal sharing of electrons between atoms polar covalent bonds - unequal sharing of electrons in a molecule hydrogen bonds - Very weak bonds; occurs when a hydrogen atom in one molecule is attracted to the electrostatic atom in another molecule temperature properties of water - High specific heat capacity