The following graph represents the concentration of cyclins over the course of the cell cycle. Which of the following statements is TRUE regarding the phase of the cell cycle where the red arrow is pointing?
A. At this point in the cell cycle, all sister chromatids are fully formed.
B. At this point in the cell cycle, DNA has already been replicated correctly.
C. At this point in the cell cycle, chromosomes have properly aligned on the metaphase plate and are beginning to separate.
D. At this point in the cell cycle, the cell is determining if conditions are favorable for cell division.
E. At this point in the cycle the cell is continuing to grow and make abundant tubulin proteins.
D. At this point in the cell cycle, the cell is determining if conditions are favorable for cell division.
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Deoxygenated blood is initially collected by the:
a. dorsal aorta. b. sinus venosus. c. atrium. d. bulbus arteriosus. e. vena cava.
What was the average number of spots at the start of your experiments?
a. 1.0 spots b. 2.0 spots c. 3.0 spots d. 4.0 spots
All of the following are true of the second law of thermodynamics EXCEPT:
(A) the amount of useful energy decreases. (B) spontaneous changes result in a more uniform distribution of energy. (C) all chemical reactions release more energy than they consume. (D) there is a natural tendency toward greater disorder of the organization of matter. (E) NONE of the above
Four of the following describe a bilaterally symmetrical animal. Which one is the exception?
A. It has left and right sides. B. It usually displays cephalization. C. It produces mirror images regardless of the number of “cuts” through the central axis. D. It usually has a three layer body plan. E. It can be a deuterostome.