BSC 2011 Practice Exam 4 Test
Questions and All Correct Answers
Updated.
A disease that severely reduces a population of bats is an example of a... - Answer density-
dependent process: mortality rates are higher at higher population densities
Which two factors are most important in determining the type of biome that develops in a given
area of ocean? - Answer light and nutrients
Phosphate is the nutrient limiting primary production in a small lake in northern Michigan. In
which way could new phosphate be made available to the primary producers in this lake? -
Answer Through rivers flowing to the lake
A test tube is inoculated with 100 cells of a bacterial strain that has a generation time of 30
minutes. The carrying capacity of the test tube for this strain is 6 billion cells. What will the
bacterial population be after 90 minutes of culturing? - Answer ~10,000
Mercury is a toxic metal that builds up in the tissues of organisms. If your goal was to avoid
consuming mercury, which of the following meals would you MOST want to avoid... - Answer
apex predators: yellowfin tuna fillet
Which of the following organisms is LEAST likely to play the role of producer in an ecosystem? -
Answer Nematode
When lichens grow on bare rock, they may eventually accumulate enough organic material
around them to supply the foothold for later rooted vegetation. These early pioneering lichens
can be said to do what to the later arrivals? - Answer Facilitate
Which of the following ecological problems might result from applying phosphorus-rich fertilizer
to a golf course? - Answer overabundance of algae and cyanobacteria in nearby lakes and
rivers caused by phosphorus runoff
During exponential growth, a population always ________. - Answer grows at its maximum
per capita rate population growth rate, also called the intrinsic capacity for increase
You buy an island and stock it with 1000 ground squirrels. There is no emigration or immigration
to the island and the squirrels die at a rate of 120 per year. What is the maximum number of
new daughters that can be born each year on average and still have the population shrink? -
Answer 59
Questions and All Correct Answers
Updated.
A disease that severely reduces a population of bats is an example of a... - Answer density-
dependent process: mortality rates are higher at higher population densities
Which two factors are most important in determining the type of biome that develops in a given
area of ocean? - Answer light and nutrients
Phosphate is the nutrient limiting primary production in a small lake in northern Michigan. In
which way could new phosphate be made available to the primary producers in this lake? -
Answer Through rivers flowing to the lake
A test tube is inoculated with 100 cells of a bacterial strain that has a generation time of 30
minutes. The carrying capacity of the test tube for this strain is 6 billion cells. What will the
bacterial population be after 90 minutes of culturing? - Answer ~10,000
Mercury is a toxic metal that builds up in the tissues of organisms. If your goal was to avoid
consuming mercury, which of the following meals would you MOST want to avoid... - Answer
apex predators: yellowfin tuna fillet
Which of the following organisms is LEAST likely to play the role of producer in an ecosystem? -
Answer Nematode
When lichens grow on bare rock, they may eventually accumulate enough organic material
around them to supply the foothold for later rooted vegetation. These early pioneering lichens
can be said to do what to the later arrivals? - Answer Facilitate
Which of the following ecological problems might result from applying phosphorus-rich fertilizer
to a golf course? - Answer overabundance of algae and cyanobacteria in nearby lakes and
rivers caused by phosphorus runoff
During exponential growth, a population always ________. - Answer grows at its maximum
per capita rate population growth rate, also called the intrinsic capacity for increase
You buy an island and stock it with 1000 ground squirrels. There is no emigration or immigration
to the island and the squirrels die at a rate of 120 per year. What is the maximum number of
new daughters that can be born each year on average and still have the population shrink? -
Answer 59
