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Question 1 of 10
Animals that feed exclusively on plants are called:
Question 2 of 10
The graph below shows the population of fur seals on one of the Pribilof Islands, a group of volcanic islands near the coast of Alaska. Scientists believe that fur seals first arrived on this island in the year 1902. The red circles are population estimates and the red line is the population trend line.
What is the island’s approximate carrying capacity for fur seals?
Question 3 of 10
Students are researching families with one brown-haired parent and one red-haired parent to understand how recessive hair-color genes interact with dominant genes. They studied the offspring of a heterozygous brown-haired man (Bb) and a homozygous recessive red-haired woman (bb). Of their four children, three have brown hair and one has red hair. The students prepared the Punnett square that is shown below.
If the couple has another child, what is the probability that this child will have brown hair?
Question 4 of 10
In the 21st century, worker bees in bee colonies have been abandoning their queens and are deserting their hives in record numbers. Known as Colony Collapse Disorder, honeybees have been mysteriously disappearing across the planet—and one area that has been seriously affected is California’s Napa Valley. This issue became more commonly known when The National Agriculture Statistics Service reported in 2008 that only 2.44 million honey-producing hives were in the United States, down from 4.5 million in 1980.
There is no consensus among scientists as to what is causing Colony Collapse Disorder, though the USDA has undertaken a plan of action to stem the collapsing colonies involving several steps: survey and data collection; analysis of samples; hypothesis-driven research; mitigation and preventive action. The first findings from the USDA were published in 2009, and suggested factors such as pesticides, parasites, and pathogens may be possible causes, all of which have affected hives in Northern California.
One researcher has hypothesized that chemical pesticides are solely responsible for colony collapse disorder in Napa Valley. To test her hypothesis she is planning to run an experiment. She has obtained several healthy bee colonies and plans to expose them to pesticides while measuring the health of the colonies.
Which additional information would be the most useful in helping her design this experiment?
Question 5 of 10
Fahrenheit is a thermodynamic temperature scale, where the freezing point of water is 32 degrees Fahrenheit (°F) and the boiling point 212°F (at standard atmospheric pressure). Celsius, also called centigrade temperature scale, is a scale based on 0° for the freezing point of water and 100° for the boiling point of water. In order to convert Fahrenheit to Celsius, the following formula can be used:
\(°C = (°F − 32) \times \dfrac{5}{9}\)
A measure of 70 °F is equal to which of the following in Celsius? You may use your calculator.
Question 6 of 10
A study was done to measure the effectiveness of an antibiotic on different bacteria. The antibiotic Vancomycin was tested on 3 types of bacteria: Enterococcus, Staphylococcus, and Streptococcus. Bacterial growth was measured at 3 different durations of time exposure to the antibiotic: 1 hour, 24 hours, and 7 days. The rate of bacterial growth was measured by bacterial colony size at each time interval. The data for each duration was calculated and compiled into the graph shown below. As a control, each bacteria species was also grown with no exposure to the antibiotic. This control culture was measured after 7 days.
What are the independent and dependent variables in this experiment?
Question 7 of 10
A study was done to measure the effectiveness of an antibiotic on different bacteria. The antibiotic Vancomycin was tested on 3 types of bacteria: Enterococcus, Staphylococcus, and Streptococcus. Bacterial growth was measured at 3 different durations of time exposure to the antibiotic: 1 hour, 24 hours, and 7 days. The rate of bacterial growth was measured by bacterial colony size at each time interval. The data for each duration was calculated and compiled into the graph shown below. As a control, each bacteria species was also grown with no exposure to the antibiotic. This control culture was measured after 7 days.
Based on these results, Vancomycin is most effective against:
Question 8 of 10
A cladogram is a diagram that organizes species into groups based on their similarities. It also shows evolutionary relationships among the groups.
Based on the information in this cladogram, which of these statements is true?
Question 9 of 10
A laboratory produces and tests a new flu vaccine designed to prevent the influenza virus. The lab tests four dosages of the vaccine on 400 individuals, male and female, between the ages of 18 and 65 over a 3-month trial during flu season. Each group has 100 randomly assigned participants. The table shows the dosages of the flu vaccine given to each individual in the group, as well as the number of individuals that reported having influenza during the 3-month trial.
Flu Vaccine Study
Group Dosage No. of Flu Cases
1
25 mg/day
22
2
50 mg/day
19
3
100 mg/day
7
4
200 mg/day
4
The laboratory has published findings in which they claim that the new flu vaccine can prevent the influenza virus. However, a competing lab has criticized the findings, claiming that there is an error in the way the groups were setup. What changes to the test setup would eliminate the source of the error?
Question 10 of 10
Bike Race Data
Racer Distance (m) Time (s)
1
1550
103
2
1550
110
3
1600
116
4
1600
125
5
1600
116
6
1600
144
velocity (m/s) = distance (m) / time (s)
What is the mean time, in seconds, for all of the bicycle racers?
