Questions+31-40+(per+2)

48. What are the three tree pigments? a. chlorophyll, carotenoids, anthocyanins. b. chloroplasts, carotenoids, anthocyanins. c. chloropyll, carrots, purplish redish color. d. chloroplasts, carotenoids, anthrax.

49. Trees change color because of what? a. shortening of photography. b. shortening of photoperiod. c. shortening of photosynthesis. d. because the days become shorter. e. both b and d

50. Which pigment is dominant and why?

51. Where is chlorophyll found? a. chloroplasts. b. crayola. c. trees. d. plants. e. all of the above. f. all of them above but b.

52. What is the purpose of carotenoids? a. absorb different wave lenghts to assist in photosynthesis. b. absorb the orange color from the sun. c. make food for the plant. d. hide chlorophyll.

53. What does beta-carotene do for humans? a. gives them a nice orangish tan. b. helps them make vitamin a. c. cures blindness (vision) d. makes carrots good to eat.

54. Which pigment is produced as the sugar breakdown in the leaf slows? a. purple b. anthocyanins. c. chloroplasts. d. blue and green.

55. Explain and draw the difference between simple and compound leaves.

56. What is another name for a smooth margin? a. entire leaf. b. entire. c. complete margin. d. soft margin. e. petiole.

57. What is a petiole? a. smooth margin b. leaf stalk. c. leaf body. d. entire.

58. What is the difference between a leaf scar and a bundle scar?

59. Where is the pith found on a twig? a. on top of the bark. b. in the center. c. on the top of the leaves. d. in the canopy.

60. What is the difference between a thorn and a spine? a. thorn is a modified branch and a spine is a modified leaf. b. spine is a modifiied branch and a thorn is a modified leaf. c. theres no difference. d. they are both found in the center of the tree.

61. What are xylem and phloem and explain their purposes?

62. Draw a picture of a leaf with compound alternate leaves.

63. What are the characteristics of carotenoids? a. orange, purple, and red organic pigments. b. good for vision. c. essential for the photosyntheis. d. present only in autum. e. all of the above. f. answer not present.