The sugar-phosphate backbone of the DNA is held together by hydrogen bonds
1.True
2.False
2
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Which group of mammals exhibits the widest
distribution and greatest diversity? a. marsupials b. monotremes c. placentals d. marsupials and monotremes e. placentals and monotremes
Which of the following is NOT part of the CNS?
a. Schwann cells b. ganglia c. cranial nerves d. brain e. spinal nerves
Digestion begins in the
A) small intestine. B) oral cavity. C) esophagus. D) stomach.
Liquid water has surface tension and a high specific heat, and it functions effectively as a solvent for polar covalent and ionically bonded molecules. What feature of water imparts these properties?
A) The hydrogen and oxygen that make up water form nonpolar covalent bonds. B) It readily dissociates to form H+and OH- ions. C) It has a high molecular weight. D) Water readily forms hydrogen bonds with other water molecules, and with polar solutes.