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Exam 1A%2c 09 KEY

Exam 1A%2c 09 KEY - 1 BTNY 210 Exam IA Name_KEY Lab Day and...

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1 Exam 1A, S09 BTNY 210 Name_______ KEY __________________ Exam IA Lab Day and Time____________________ February 11, 2009 Multiple Choice: Choose the best answer and fill in the appropriate circle on the answer sheet. 1. “Without plants, life on this planet could not exist as it does today.” This is true because plants: a. produce food from CO 2 and water b. produce essential amino acids c. produce fiber for many human uses d. produce oxygen gas e. all of the above 2. Stems always have: 3. A potato is an example of a modified plant organ that helps this plant store food for the winter. This organ is a: 4. In the axis of every leaf is a(n): True or false. Mark the T (A) for a true statement and F (B) for a false statement. 5. True or false. The youngest cells in a mature soybean plant are at the very tip of the stem. 6. True or false. Protons have a relative mass of 1.
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2 Exam 1A, S09 7. True or false. Atoms are more stable if the electron shells are full. 8. True or false . Since a water molecule is held together by covalent bonds, it is completely non-polar. That is, it has no charges associated with it. 9. True or False. Organic molecules always contain Hydrogen and Carbon. 10. True or false. Starch and cellulose are both polymers of glucose, . 11. True or false. All plant cells have cell walls. 12. True or false. The primary cell wall, when present, is located outside the secondary cell wall. 13. True or false. The plasma membrane is made up of a lipid bilayer. 14. True or false. At the end of S phase of the cell cycle each chromosome consists of two chromatids. 15. True or false . The only part of a cell that contains DNA is the nucleus. 16. The phase of the cell cycle when the cell doubles in size is: a. M phase (mitosis and cytokinesis) b. S phase c. G 1 phase d. G 2 phase e. B phase
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