In a given strand of DNA, complementary bases are connected to each other by _____
a. ionic bonds
b. polar covalent bonds
c. hydrogen bonds
d. peptide bonds
e. nonpolar covalent bonds
ANSWER: c
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Which of the following is true for a nerve cell at rest?
A. Channels allow for the movement of potassium out of the cell. B. Sodium ions are concentrated outside the cell. C. Channels allow for the movement of chloride into the cell. D. Channels allow for the movement of potassium out of the cell AND sodium ions are concentrated outside the cell.
What is the organism with the longest evolutionary history in this diagram?
a. human b. pig c. snake d. yeast
What fraction of the time will the cross of Aa Bb with Aa Bb produce an offspring that is aa bb?
a. 16/16 b. 9/16 c. 6/16 d. 3/16 e. 1/16
Which species lives in “disturbed habitats”?
a. fish b. deer c. insects d. humans e. birds