1. NINE WEEKS REVIEW

2. The theme that reflects the idea that there has been a gradual change in the characteristics of species over time is _____.
a. energy c. reproduction
b. unity within diversity d. evolution

3. D

4. Which of the following studies is outside the realm of science?
a. astrology c. plant growth
b. animal behavior d. bacterial reproduction

5. A

6. _____ research is usually based on numerical measurements.
a. Ethical c. Quantitative
b. Descriptive d. Scientific

7. C

8. Which of the pictures in Figure 1-10 shows the most diversity?a. b. C.

9. C

10. The organisms growing on the log in Figure 2-8 are ____?
A. producers c. carnivores
b. autotrophs d. decomposers

11. D

12. Which organism shown in the pyramid shown in Figure 2-9 receives the highest percentage of energy from the sun?
Figure 2-9
a. fox c. grasshoppers
b. birds d. grass

13. D

14. A girl notices that her guppies reproduce most when her fish tank water is slightly alkaline. They stop reproducing if the water becomes acidic or if the water becomes too alkaline. This is an example of _____.
a. secondary succession c. communities
b. zones of tolerance and intolerance d. intertidal zones

15. B

16. Ling feeds her guppies one-half teaspoon of fish food every day
Ling feeds her guppies one-half teaspoon of fish food every day. The average guppy population in her aquarium over a four-month period is 38 guppies. She increased the food to one teaspoon per day. After a four-month period, the average population is 53 guppies.
When Ling increased the amount of food, what happened to the carrying capacity of the aquarium?
a. It increased. c. It remained the same.
b. It decreased. d. It increased and then decreased.

17. A

18. The stable ecosystem that develops due to succession _____.
a. is called a niche c. is called a climax community
b. is always a forest d. never changes

19. C

20. One advantage of electron microscopes over light microscopes is their _____.
a. size c. two-dimensional image
b. higher magnification d. use of live specimens

21. B

22. If a cell contains a nucleus, it must be a(n) _____.
a. plant cell c. animal cell
b. eukaryotic cell d. prokaryotic cell

23. B

24. Which of the following might be a result of a disease that causes a thickened plasma membrane?
a. increased movement of molecules entering the cell
b. decreased movement of molecules within the cell
c. decreased movement of molecules entering the cell
d. increased movement of molecules leaving the cell

25. C

26. A cell's contents would be the same as its surrounds, were it not for ____.
a. plasmolysis c. phagocytosis
b. selective permeability d. dynamic equilibrium

27. B

28. What would be the best way to estimate the size of C in Figure 7-3?
a. increase magnification
b. decrease magnification
c. estimate by what you can see
d. assume it is 2000 mm

29. B

30. What would happen to the structure in Figure 7-4 if part D is completely removed?
a. it would become solid c. it would have holes in it
b. it would disintegrate d. it would collapse in on itself

31. D

32. A cell contains the structure shown in Figure 7-7
A cell contains the structure shown in Figure 7-7. What other cell structure that is not found in all eukaryotic cells is likely to be found in this cell?
a. mitochondria c. cell wall
b. ribosomes d. plasma membrane

33. C

34. A cell moves particles from a region of lesser concentration to a region of greater concentration by _____.
a. facilitated diffusion c. osmosis
b. passive transport d. active transport

35. D

36. A gene is a segment of DNA that controls the production of _____.
a. carbohydrates c. centromeres
b. microtubules d. proteins

37. D

38. Which of the following monitors a cell's progress from phase to phase during the cell cycle?
a. a series of enzymes c. lipid molecules
b. microtubules d. protein molecules

39. A

40. If cancer is present, what is the likely explanation for what happened to cells B and D?
a. they thrived with the cancerous cells
b. they were harmed by radiation therapy
c. they died off on due to natural causes
d. they died off because the cancerous cells deprived them of nutrients

41. D