Seina

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1. The properties of water are most directly due to what type of bonds? A) Polar covalent bonds
B) Hydrogen bonds
C)   Ionic bonds
D)   Peptide bonds
 
2. Which of the following takes place as an ice cube cools a drink? A) Evaporation of the water in the drink increases. 
B) Kinetic energy in the drink decreases. 
C) The specific heat of the water in the drink decreases. 
D) A calorie of heat energy is transferred from the ice to the water of the drink.  E) Molecular collisions in the drink increase. 
 
***3. Temperature usually increases when water condenses. Which behavior of water is most directly responsible for this phenomenon? A)  the release of heat by the formation of hydrogen bonds  B)  the change in density when it condenses to form a liquid or solid  C)  reactions with other atmospheric compounds 

D)  the release of heat by the breaking of hydrogen bonds  E)  the high surface tension of water 
 
***4. Differences among organisms are caused by
A)  differences in the sizes of the organic molecules in each organism.  B)  large differences in elemental composition from organism to organism.  C)  differences in the types and relative amounts of organic molecules synthesized by each organism. D)  differences in the elements that bond with carbon in each organism.  E)  differences in inorganic compounds present in each organism.  

***5. Which of the following statements best describes the carbon atoms present in a seed-eating bird? A) The carbon atoms ultimately came from carbon dioxide incorporated into sugars through photosynthesis.

B) The carbon atoms ultimately came from the soil. 
C) The carbon atoms are ultimately derived from coal. 
D) Inorganic carbon atoms in the seeds were incorporated into organic molecules by the bird.  E) The carbon atoms ultimately came from simple organic compounds that formed abiotically from inorganic carbon, hydrogen, oxygen, and nitrogen atoms.

 
6. The molecular formula for glucose is C6H12O6. What...
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