1. 4
2. 1
3. 1
4. 1
5. 4
6. 3
7. 2
8. 4
9. 1
10. 2
11. 4
12. 2
13. 1
14. 2
15. 3
16. 2
17. 4
18. 3
19. 3
20. 2
21. 1
22. 4
23. 3
24. c
25. d
26. b
27. e
28. c
29. 2
30. 3
31. 1
32. 2
33. 3
34. 4
35. 2
36. 2
37. 1
38. 1
39. 2
40. 1
41. 4
42. The amount of digestion after 48 hours is the
dependent variable, as it depends on
the temperature the
digestion was happening at.
43. 2
44. I
45. H
46. G
47. I
48. G
49. The student should have run more trials of this
investigation.
The student should
have used more tomato plants in this investigation.
(Other complete sentence
responses may be acceptable.)
50. The student should add acid to the water in the test tube
to reduce the chance
acid will splash from the test
tube. The student should wear safety goggles and
a safety apron to prevent injury
from any materials which may splash from the
test tube. The student should
point the test tube away from himself and others
so its contents to spill out on
others. (Other complete sentence responses may
be acceptable.)
51. 3
52. F
53. B
54. A
55. D
56. E
57. G
58. E
59. D
60. B
61. J
62. A
63. C
64. 4
65. 3
66. 2
67. 2
68. 2
69. 1
70. 4
71. 1
72. 2
73. You brush the bee off from your shirt. (Other complete
sentence responses may
be acceptable.)
74. 4
75. 2
76. 3
77. 1
78. 4
79. 3
80. 1
81. 4
82. Kingdom, Phylum, Class, Order, Family, Genus, Species
83. Some white blood cells mark bacteria or foreign substances
for destruction. Some
white blood cells engulf bacteria
directly (phagocytic white blood cells). Other
white blood cells are responsible
for the production of specific antibodies against
a particular antigen.
84. The measles vaccine contains weakened measles virus.
This virus is a pathogen or
foreign invader. This
foreign virus, like any foreign substance entering the body is
an antigen. This stimulates
specific white blood cells in the body to make antibodies, which
are chemicals to destroy this antigen.
The mobilization of the body to attack an antigen
like this is called the immune response.
The immune response which occurs when
someone is initially exposed to an antigen
(like this measles vaccine) is called the
primary immune response.
After this threat is met, the level of measles antibodies falls to
a very low level in our body.
However, our immune systems have a memory and will
increase the level of antibodies immediately
if a measles antigen invades our body even
many years later. This is
called a secondary immune response and will destroy any
subsequent invasions of this specific
virus.
85. The student should center the specimen in the field of view
on low power before
switching to high power.
The student should open the diaphragm or adjust the mirror
when switching from low power
to high power to increase the available light. The student
should use the coarse adjustment
when focusing on low power, but the fine adjustment
when focusing on high power.
(Other responses may be acceptable.)
86. The disease is spread from infected animals to ticks that
bite these animals.
Humans bitten by these parasitic
ticks may then become infected.
87. People may frequently checking themselves and their pets
for ticks.
People may tuck pant legs into
socks when walking through the woods.
People may wear light colored
clothing to aid in spotting a tick.
People may use insect repellent.
88. An individual may develop a skin rash several days to weeks
after being bitten by
a tick.
Flu like symptoms such as headaches,
muscle aches, joint pain, and fever may also develop.
Also, in some cases there may
be no symptoms other than a sudden onset of
arthritis.
In a small number of cases, if
the infection is not treated, it may lead to chronic
arthritis, disorders of the heart
and nervous system, or in a few cases, death.
(Any two of these symptoms provides
a correct answer.)
89. In a small number of cases, if the infection is not treated,
it may lead to chronic
arthritis, disorders of the heart
and nervous system, or in a few cases, death.