Metabolic activities that involve "burning" carbohydrates release energy. When our bodies "burn" carbohydrates, what are we doing?
A) transferring some energy from the carbohydrate molecule to other molecules and releasing lower-energy food molecules into the alimentary canal
B) breaking down food molecules into smaller molecules such as simple sugars that have more energy than the original food molecule and can be used in the cell more easily
C) transferring energy from the bonds in food molecules to molecules that make that energy more readily available (like ATP) and releasing simple low-energy molecules (like CO2 and H2O) to the environment
D) breaking down carbohydrate molecules to smaller components that are then used to build larger molecules that the body needs
Answer: C
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a. true b. false
Which principle of heat exchange is the most important explanation for why birds look larger in colder weather because they fluff their feathers?
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Antibiotics that target the cell wall are an effective treatment against many pathogenic bacteria
Indicate whether the statement is true or false