3.  1,000,0001,000,000  500,000500,000  250,000250,000  125,000125,000  64,00064,000  32,00032,000  16,00016,000  8,0008,000  4,0004,000  2,0002,000  1,0001,000  500500  300300  200200  100100

4. Click to return to question, Cont-P to switch to the pen, cross out two incorrect answers, then Cont-A to switch back to pointer.

5. Click to return to the question and poll the class

6. Click on link to Ask Jeeves, or click on this oval to return to question and ask a friend

7. A.publishing data for peerpublishing data for peer review C. Bacteria were the first type of living organisms to appear on earth B. Life evolved on earth from inanimate chemicals D. Complex organic molecules can form spontaneously under conditions that probably existed on the early earth Theory A is a well-established scientific theory. One hypothesis that could refute this theory is successfully tested over many experiments. What action must be taken for this hypothesis to pose a legitimate challenge to Theory A?

8. Back to Board A.publishing data for peer review

9. A. Subjects Q and S have the same resting blood pressure C. Subjects R and T have different resting blood pressure B. Subjects Q and R are different ages D. Subjects S and T are the same gender A student performed an investigation of blood pressure. The data is shown above in the table. The student concluded the resting heart rate affects the resting blood pressure. Which statement support’s the student’s conclusion?

10. Back to Board C. Subjects R and T have different resting blood pressure

11. A. Decrease in the total number of cells per organism C. single fertilized egg cell B. reduction in the number of chromosomes per cell D. group of genetically identical cells The diagram above shows the process of meiosis. The segregation that occurs during meiosis results in a

12. Back to Board B. reduction in the number of chromosomes per cell

13. A. Decrease in available oxygen C. Increase in temperature B. increase in light intensity D. Decrease in carbon dioxide Scientists determined that excess fertilizer from farms entered a shallow lake. The fertilizer caused an increase in aquatic plants in the lake and then a decrease in oxygen in the water. Next, organic debris collected on the bottom of the lake. Over several years, the lake gradually filled in with organic sediment. As the fertilizer levels increased, the population of consumers in the lake declined. Which change most likely caused this decline?

14. Back to Board Decrease in available oxygen

15. A. Flagella C. Cell walls B. Hereditary material D. nuclear membranes Lo riciferans are microscopic multicellular animals that live in various marine sediments. Scientists have discovered genera of Loriciferans in a deep-sea habitat that lacks oxygen. Before this discovery, some prokaryotes and some unicellular eukaryotes were known to inhabit anaerobic environments. Among the newly discovered Loriciferans is Spinoloricus sp nov., which is show above. Scientists determined that organisms of the genus Spinoloricus were eukaryotes and not prokaryotes because Spinoloricus cells have

16. Back to Board D. nuclear membranes

17. A. Meiosis C. translation B. osmosis D. replication The diagram above represents part of a process that occurs in cells. Which process is represented?

18. Back to Board C. translation

19. A.Use their limbs for theUse their limbs for the same function C. Occupy the same level in a food pyramid B. Share a common ancestor D. Adapted to the same environmental conditions The pictures above show the limbs of four different species. The four species illustrated most likley have similar limb structures because they all

20. Back to Board B. Share a common ancestor

21. A. Lysosome C. ribosome B. Golgi body D. mitochondrion Amino acids link together by peptide bonds to form proteins. In which cellular organelle would this process occur?

22. Back to Board C. ribosome

23. A. polygenic D. codominantC. dominant B. sex-linked In a certain variety of chicken, some offspring have a feather pattern that is black-and-white checkered. Chickens with this checkered feather pattern result from the cross of a black chicken with a white chicken. Which of the following types of inheritance is most likely responsible for the checkered feather pattern?

24. Back to Board D. codominant

25. A student observes a unicellular organism under a microscope. After a while, the organism begins to split into two cells, a shown in the diagram. Which of these structures does the organism shown above use to move itself? A. nuclei C. flagellaD. ribosomes B. cilia

26. Back to Board B. cilia

27. A. crossing over during meiosis The results of a genetic process are represented in the diagram above C. Independent assortment B. chromosomal mutation D. Nondisjunction during meiosis

28. Back to Board A. crossing over during meiosis

29. B. decrease in fish populations A. decrease in salinity levels C. increase in producer populations D. increase in water temperature The water quality of the Biscayne Bay is measured by the Biscayne Bay Water Quality Monitoring Program. Scientists measure the salinity, temperature, pH, and oxygen levels to help determine the health of the Bay. Healthy water also contains appropriate amounts of nutrients. Monitoring water quality helps communities make decisions about the Bay. Which of these would likely be the most immediate result if the oxygen levels in the Bay decreased by 90%?

30. Back to Board B. decrease in fish populations

31. C. the molecule is single stranded The figure above shows genetic material. What information confirms that this is an RNA molecule? A.the molecule containsthe molecule contains adenine B. The molecule has hydrogen bonds. D. The molecule has a sugar-phosphate backbone.

32. Back to Board C. the molecule is single stranded

33. D. A. C. The chart below shows the results of an experiment to determine the most likely area in which to find pill bugs. Which graph below is the BEST representation of these data? B.

34. Back to Board D.

35. A. The two structures appear almost identical at an early stage of embryonic development B. The genes coding for the two structures utilize the same nitrogenous bases D. The structures perform similar digestive functions in birds and mammals C. The structures are vestigial in the digestive tracts of both birds and mammals A biologist has hypothesized that a structure in the digestive tract of birds is homologous to a structure in the digestive tract of certain mammals. Which of the following findings would provide the best evidence in favor of this view?

36. A. The two structures appear almost identical at an early stage of embryonic development

37. Sorry, try again!

38. Thanks for playing!