120 The diagram below shows the results of a field study on the 
effect of low-pitched sounds on elephant behavior. Four speakers 
were placed on the elephant range and different low-pitched sounds
were transmitted from each speaker.

If speaker A was moved to the edge of the waterhole, what change in
elephant behavior, if any, would most likely occur?

1 The elephants would go to the waterhole only when they
needed water. 
2 A larger number of elephants would gather at the waterhole. 
3 All the elephants would gather around speaker C. 
4 No change would occur, because elephant behavior cannot 
be modified.

121 From the diagram of a flower shown below, record the letter of 
a part that produces monoploid cells.

122 A large island in the Pacific Ocean supports isolated populations 
of two groups of frogs.

The following observations of these frogs were recorded by scientists.

(A) Are different in color
(B) Excrete different products
(C) Live in different, isolated habitats
(D) Can interbreed and produce fertile offspring

Which observation best supports the inference that these frogs 
belong to the same species?

(1) A               (3) C
(2) B               (4) D

123 A gas resulting from aerobic respiration is released into water. 
Which substance could be used to indicate a change in the water 
due to the release of the gas?

1 bromthymol blue           3 iodine solution
2 Benedict's solution        4 methylene blue

124 Using one or more complete sentences, describe a laboratory 
activity during which a person should wear safety goggles.

Group 4

If you choose this group, be sure to answer questions 125-129.

Base your answers to questions 125 through 128 on the information 
and data table below and on you knowledge of biology.

Three biology students wanted to find out if adding fertilizer to some potting soil
would affect the germination of radish seeds. Each student added an equal amount
of potting soil from the same bag to each of 10 cups. Student A added I gram of 
fertilizer to each cup of soil in group A. Student B added 2 grams of fertilizer to 
each cup of soil in group B. Student C added 3 grams of fertilizer to each cup of soil
in group C. After stirring the mixture to obtain an even distribution of fertilizer, 8 
radish seeds were placed in each cup and covered with 0.5 centimeter of soil. 
Over the next 6 days, all conditions, including the amounts of water and sunlight, 
were kept the same. The results are recorded in the data table below.

Directions (125-127): Using the information in the data table, 
construct a line graph on the grid provided on your answer paper, 
following the directions below. The grid on the next page is provided 
for practice purposes only. Be sure your final answer appears on your
answer paper.

125 Mark an appropriate scale on each labeled axis.

126 Plot the data for group A on the grid. Surround each point with 
a small circle and connect the points.

Example: 

127 Plot the data for group B on the grid. Surround each point with 
a small triangle and connect the points.

Example:

128 Using one or more complete sentences, state one error in the 
design of this experiment.

129 Which procedure must be followed for the results of an 
experiment to be considered valid?

1 The experiment must be repeated a number of times and yield 
similar results. 
2 After one trial, the results of the experiment must be published. 
3 The results must be expressed in the form of a table or graph. 
4 The data must include metric measurements

Group 5

If you choose this group, be sure to answer questions 130-134.

130 What information from the list below must be used to estimate 
the length of a cell under the low-power objective of a compound 
light microscope?

Information

A Type of cell in the field 
B Magnification of the low-power objective 
C Magnification of the high-power objective 
D Diameter of the low-power field of view 
E Number of cells that fit end-to-end across the diameter of 
the low-power field of view

(1) A and C, only 
(2) A, B, C, and E, only 
(3) D and E, only
(4) A, B, C, D, and E

Base your answers to questions 131 and 132 on the information and 
diagram below and on your knowledge of biology.

The diagram below represents a specimen on a slide as seen with the
low-power objective of a compound light microscope.

131 Using one or more complete sentences, explain how the slide 
should be moved to observe the entire specimen.

132 Which type of cell is most likely represented in this diagram?

133 A student observing a specimen using the lowpower objective
of a compound light microscope has difficulty viewing the image 
because the field of view is too dark. The student can correct the 
problem by

1 adjusting the diaphragm
2 using the coarse adjustment 
3 switching to the high-power objective 
4 cleaning the high-power objective

134 When onion cells are observed with a compound light 
microscope, which laboratory technique is used to make the 
nucleus more visible?

1 centrifugation             3 microdissection
2 chromatography         4 staining

END OF EXAM

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