Boilogy 1402 test 1 vocab

Boilogy 1402 test 1 vocab - 1 Evolution Desent with...

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1. Evolution: Desent with Modifuication; genetic change in a population or species over generations; the heritable changes that have produced Earth’s diversity of organisms. 2. Natural Selection: A process in which organisms with certain inherited characteristics are more likely to survive and reprodice than are organisms with other characteristics; differential reproductive success. 3. Adaptation: A population’s increase in the frequency of traits suited to the enviroment. The term can also refer th the trait itself; for example an insect’s camouflage is an adaption that helps it avoid predators. 4. Heritable Variation: 5. DNA: The genetic material that organisms inherit from their parents; a double-stranded helical macromolecule consisting of nucleotide monomers with deoxyribose sugar, a phosphate group, and the nitrogenous vases adenine (A), Cytosine (C), guanine (G), and thymine (T). 6. Genetic Information: 7. Latitude: 8. Climate: 9. Tropics: Region between the Tropic of Cancer and the Tropic of Capricorn; latitudes between 23.5 ° north and south. 10. Temperate: Latitudes between the tropics and the Arctic Circle in the north and the Antarctic Circle in the south; regions with milder climates than the tropics or polar regions. 11. Prevailing Winds: 12. Rain Shadow: 13. Biome: A major terrestrial or aquatic life zone, characterized by vegetation type in terrestrial biomes or the physical environmental in aquatic biomes. 14. Element: A substance that cannot be broken down into other substances by chemical means. Scientist recognizes 92 chemical elements occurring in nature. 15. Compound: A substance containing two or more elements in a fixed ratio; for example, table salt (NaCl) consists of one atom of the element sodium (Na) for every atom of chlorine (Cl). 16. Atom: The smallest unit of matter that retains the properties of an element. 17. Molecule: A group of two or more atoms held together by covalent bonds. 18. Proton: A subatomic particle with a single unit of positive electrical charge, found in the nucleus of an atom. 19. Neutron: An electrically neutral particle (a particle having no electrical charge), found in the nucleus of an atom. 20. Electron: A subatomic particle with a single unit of negative electrical charge. One or more electreions move around the nucleus of an atom. 21. Atomic Nucleus: An atom’s centrtal core, containing protons and neutrons. 22. Isotope: A variant form of an atom. Isotopes of an element have the same number of protons and electrons but different number of neutrons. 23. Isomer: One of two or more molecules with the same molecular formula but different structures and thus different propteries.
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24. Ion: An atom or molecule that has gained or lost one or more electrons, thus aquiring an electrical charge. 25.
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This note was uploaded on 04/03/2012 for the course BIOLOGY 1402 taught by Professor Held during the Spring '11 term at Texas Tech.

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Boilogy 1402 test 1 vocab - 1 Evolution Desent with...

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