MC	Biology	Standard: 01
Objective: 03. Describe how interactions among organisms and their environment help shape ecosystems.
ILO:

Organisms that can live entirely by themselves with absolutely no relationships to other species are

a. Predatory

b. Biological

c. Producers

d. Non-existent

Correct Answer: d

MC	Biology	Standard: 01
Objective: 03. Describe how interactions among organisms and their environment help shape ecosystems.
ILO:

A theory differs from a hypothesis in that a theory is

a. A guess that can be tested by experiments.

b. A generalization that unifies many scientific observations.

c. An experiment designed to provide evidence for a prediction.

d. A scientific fact that needs no supporting evidence.

Correct Answer: b

MC	Biology	Standard: 01
Objective: 03. Describe how interactions among organisms and their environment help shape ecosystems.
ILO:

A researcher investigated two groups of fruit flies. Population A was kept in a 0.5-L container. Population B was kept in a l.-L container. Below is a graph showing the growth of these two populations.

1. What is the manipulated variable?

A. The number of flies.

B. The time in days.

C. The numbers of groups studied.

D. The size of the containers.

2. Which of the following is a logical inference based on the contents of the graph?

A. The flies in Group B were healthier than those in Group A.

B. A fly population with more available space will grow larger than a population with less space.

C. If Group B were observed for 40 more days, the size of the population would double.

D. In 40 days, the sizes of both populations would decrease at the same rate.

Correct Answers:

1. d

2. b

MC	Biology	Standard: 01
Objective: 03. Describe how interactions among organisms and their environment help shape ecosystems.
ILO:

A student observed that the lawn at the school is beginning to grow yellow patches. Which of the following should be done before writing a hypothesis that can test for the cause of the problem?

a. Write an evaluation as to why the lawn is yellow.

b. Make a graph illustrating student use of the lawn during PE and lunch.

c. Collect information about watering procedures and check for insects.

d. Write your conclusion as to why the lawn is yellow.

Correct Answer: c

MC	Biology	Standard: 01
Objective: 03. Describe how interactions among organisms and their environment help shape ecosystems.
ILO:

Study the above graph. Then assume that the research problem focuses on what factors are affecting the population of hares. Which hypothesis below best fits the problem?

Hypothesis:

a. A reduction in the hard population results in a reduction in the lynx population.

b. A reduction in the lynx population will result in an eventual reduction of hare population.

c. The hare population is not affected by the lynx population.

d. Lynx enemies are a more important determiner of lynx population.

Correct Answer: a

MC	Biology	Standard: 01
Objective: 03. Describe how interactions among organisms and their environment help shape ecosystems.
ILO:

Here is a graph showing the population of vinegar eels over a twenty day period. The graph was plotted from one of the tables of data shown below the graph. Select the letter of the data table that was used to plot the graph of vinegar eels.

Table A
Time in days	0	1	2	3	4	5	6	7	8	9	10
Population of Vinegar Eels	0.5	1	2.8	6	8.2	9.8	11.4	13	14.3	14.8	14.6

Table B
Time in days	0	2	4	6	8	10	12	14	16	18	20
Population of Vinegar Eels	50	280	820	1140	1430	1460	1020	770	570	360	180

Table C
Time in days	0	1	2	3	4	15	16	14	18	19	20
Population of Vinegar Eels	5	10	28	60	82	67	57	47	36	26	18

Table D
Time in days	0	2	4	6	8	10	12	14	16	18	20
Population of Vinegar Eels	5	28	82	114	143	146	102	77	57	36	18

Correct Answer: Table B

MC	Biology	Standard: 01
Objective: 03. Describe how interactions among organisms and their environment help shape ecosystems.
ILO:

Use the following graphs to answer the questions below.