Diffusing molecules move ________ until they are ________
A) up their concentration gradients; unevenly distributed
B) through channels of active transport proteins; evenly distributed
C) down their concentration gradients; evenly distributed
D) up their concentration gradients; evenly distributed
E) down their concentration gradients; unevenly distributed
Answer: C
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A) 20 m deep freshwater river B) 50 m deep marine water fjord C) 200 m deep saltwater lake D) 300 m deep freshwater lake
Match the following items with the correct phrases.
_______1. ____________________ are also known as immunogens. _______2. Molecules referred to as antigenic determinants are also known as ____________________. _______3. ____________________ are in a class of proteins called immunoglobulins. _______4. Small molecules called ____________________ are antigenic only when then are coupled with large carrier molecules such as proteins. _______5. ____________________ initiate type III hypersensitivity reactions. a. antibodies b. antigens c. epitopes d. haptens e. immune complexes
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a. ATP b. water c. porins d. signals e. tunnels
What is the force behind the process known as "transpiration" in plants?
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