Most reefs grow at depths of ________ meters or less
a. 15
b. 30
c. 60
d. 25
d
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Enzymes are
(a) biological catalysts. (b) agents that speed up cellular reactions. (c) proteins. (d) all of the above.
Much medical advice towards heart health indicates that you should eat less sodium (table salt). Notable higher risks of high sodium may include high blood pressure and damage to arteries or organs in your body. If you eat a single meal with large amounts of salt to suit your taste, which of these may result within minutes, as the sodium enters your bloodstream?
A. Your blood will become hypotonic, and water in your body tissues will flow into your arteries, inflating them. B. Your blood will become hypertonic, and water in your body tissues will flow into your arteries, inflating them. C. Simple diffusion of water and sodium will both balance in an isotonic condition between arteries and body tissues. D. You should expect no change in the concentration gradient because of a single meal, rather than lifestyle and diet. E. Your blood will become hypotonic, and water in your arteries will flow into your tissues, inflating them.
Which of the following statements incorrectly describes common structural features of an animal secretory cell and a photosynthetic plant cell?
a. Both cells have Golgi apparatus. d. Both cells have a plasma membrane. b. Both cells have mitochondria. e. Both cells have a nucleus. c. Both cells have chloroplasts.
Stereoisomers that are nonsuperimposable mirror images of each other are known as:
A) anomers. B) cis-trans isomers. C) diastereoisomers. D) enantiomers. E) geometric isomers