Explain how Bowman's capsule works.
What will be an ideal response?
It is a filtration device at the top of each nephron. There are capillaries in it which act as filtering devices. Blood pressure forces fluid through the capillary walls which withhold proteins and other large molecules in the blood, while passing water, small molecules, ions, and urea.
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DDT is a(n)
a. blight that affects American chestnut trees. b. endangered plant species. c. pesticide. d. wildlife refuge area in Yellowstone National Park.
The fluid portion of blood is known as blood ________; this portion constitutes approximately ________ % of the total blood volume
Fill in the blank(s) with correct word
Describe the molecular nature of mutation, as related to cancer, in a ras gene
What will be an ideal response?
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? 
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A. At this point in the cell cycle, chromosomes have properly aligned on the metaphase plate and are beginning to separate. B. At this point in the cell cycle, the cell is determining if conditions are favorable for cell division. C. At this point in the cell cycle, DNA has already been replicated correctly. D. At this point in the cycle the cell is continuing to grow and make abundant tubulin proteins. E. At this point in the cell cycle, all sister chromatids are fully formed.