AP Biology Practice Test 10

Test Information

Question 10 questions

Time 14 minutes

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Questions 1-2 refer to the following information.

The following bar graph shows the relative biomass of four different populations of a particular food pyramid.

1. The largest amount of energy is available to

2. Which of the following would be the most likely result if there was an increase in the number of organisms in population C?

Questions 3-6 refer to the following information.

The cell cycle is a series of events in the life of a dividing eukaryotic cell. It consists of four stages: G1, S, G2, and M. The duration of the cell cycle varies from one species to another and from one cell type to another. The G1 phase varies the most. For example, embryonic cells can pass through the G1 phase so quickly that it hardly exists, whereas neurons are arrested in the cell cycle and do not divide.

3. During which phase do chromosomes replicate?

4. In mammalian cells, the first sign of prophase is the

5. Mitosis occurs in all of the following types of cells EXCEPT

6. Since neurons are destined never to divide again, what conclusion can be made?

Questions 7-10 refer to the following information.

The following graphs show the permeability of ions during an action potential in a ventricular contractile cardiac fiber. The action potential of cardiac muscle fibers resembles that of skeletal muscles.

7. Based on the graph, the resting membrane potential of the muscle fibers is closest to

8. Which of the following statements is true concerning the initial phase of depolarization?

9. In cardiac fibers, the duration of an action potential is approximately

10. One major difference between the action potential of cardiac muscle fibers and the action potential of skeletal muscle fibers is that in cardiac muscle fibers