Bio Exam 2 - Antonio Alarcon Bio 2 Answer Key 08/19/07 1....

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Antonio Alarcon Bio 2 Answer Key 08/19/07 1. (See Bio Exam 2) 2. Homeostasis – Property of either an open system or a closed system which regulates its internal enviornment so as to maintain a stable, constant condition Peristalsis – Rythmic contraction of smooth muscles to propel contents though the digestive tract 3. (See Bio Exam 2) This is the correct depiction of a dipeptide fomation 4. (See Bio Exam 2 for picture) Growth – At the root tip is a covering of tissue called the root cap. It consists of undifferentiated soft tissue providing protection to the meristem cells (the cells indicated in the picture ) which allows the root of a plant ot advance through the soil 5. Monera – Obsolete biological kingdom, comprised of organism with a prokaryotic cell organization (cells lacking a cell nucleus) Protista – Comprised of organism which cannot be clasified into any other kingdom (unicellular or multicellular). Either a protozoa (animal like) or algae (plant like) contaning chloroplasts Fungi – Characterized by a chitinous cell wall, multicellular or unicellular. Sexual and asexual reproduction is via spores often produced in fruting bodies Plant – Multicellular organism, contains a cell wall and chloroplast 6. Carbon, Hydrogen, Oxygen, and Nitrogen – Living things are primarily composed of the following elements
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7. Reproduce – A virus is a sub-microscopic particle that can infect the cells of a biological organism. Yet, these particels can only replicate by infecting a host cell (thus, cannot repoduce on their own). Viral populations do not grow through cell division (they are acellular) instead the use the macherinay and metabolism of a host cell to preform either the lytic or lysogenic cycle. 8. (See Bio Exam 2) Fermentation – Process of energy production in a cell under anaerobic conditions (no oxygen required). Sugars typically are the common substrate of fermentation. Photosynthesis – Involves the conversion of light energy (radiant energy) into chemical energy 9. Mushroom – Extra-cellular digestion is a process where saprobionts (organisms that digest food externally and then absorb the products; decomposers ) feed by secreting enzymes though the cell membrane onto the food 10. Intracellular circulation – The flowing cytoplasm of an active ameba is an adaptation for intracellullar circulation 11. Egestion – Act or proces by which organisms eliminate solid or semisolid waste from the digestive tract via the anus Secretion – Process of segregating, and releasing chemical from a cell Excretion – Proces of eliminating waste production of metabolism and other matherials Oxidation – Describes a chemical reaction in which atoms have their oxidation number changed (loss of electrons) 12. (See Bio Exam 2 for picture) 1 (A, C, D, and E) A: (cilia) enable the paramecium to move and sweep food into the oral groove C: (cell mouth) where food enters D: (vacuole) E: (vacuole) 13. (See Bio Exam 2)
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14. Transports food and water
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This note was uploaded on 04/03/2008 for the course BIO 181 taught by Professor Jorstad during the Fall '07 term at University of Arizona- Tucson.

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Bio Exam 2 - Antonio Alarcon Bio 2 Answer Key 08/19/07 1....

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