BSC 2011 Exam 4 Review Questions
With Correct Answers
Red Mangroves are a local species of tree that exhibits a high amount of
parental investment in each seed. The seeds each have a relatively high chance
of surviving to adulthood, and the adults occupy almost all of the area available
to them. This plant is a good example of... - ANSWER a K-selected species
In models of logistic population growth, - ANSWER the population growth rate
slows as N approaches K.
A population of ground squirrels has an annual per capita birth rate of 0.06 and
an annual per capita death rate of 0.02. Calculate an estimate of the overall
number change in population size over one year, for a given starting population
of 1,000 individuals. - ANSWER 40 individuals added
A tsunami wipes out the entire population of mice living on an island. This is an
example of... - ANSWER a density-independent effect.
Which of the following would decrease a forest's carrying-capacity of rabbits? -
ANSWER The destruction of shrubs under which the rabbits build their nests.
If most of the individuals of a human population are in their pre-reproductive
years, you would expect the population size to ____ after 20 years. - ANSWER
increase
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 ~800
Which scenario exhibits high richness and low diversity? - ANSWER Big Cypress
preserve has dozens of species of bromeliads and orchids but the forest is
dominated by Cypress trees.
Species richness typically increases... - ANSWER as we travel from poles to the
equator.
You discover an ancient cave system that has been sheltered from climatic
forces for hundreds of thousands of years. How high do you expect species
richness to be inside the cave, compared to other cave systems that are similar
With Correct Answers
Red Mangroves are a local species of tree that exhibits a high amount of
parental investment in each seed. The seeds each have a relatively high chance
of surviving to adulthood, and the adults occupy almost all of the area available
to them. This plant is a good example of... - ANSWER a K-selected species
In models of logistic population growth, - ANSWER the population growth rate
slows as N approaches K.
A population of ground squirrels has an annual per capita birth rate of 0.06 and
an annual per capita death rate of 0.02. Calculate an estimate of the overall
number change in population size over one year, for a given starting population
of 1,000 individuals. - ANSWER 40 individuals added
A tsunami wipes out the entire population of mice living on an island. This is an
example of... - ANSWER a density-independent effect.
Which of the following would decrease a forest's carrying-capacity of rabbits? -
ANSWER The destruction of shrubs under which the rabbits build their nests.
If most of the individuals of a human population are in their pre-reproductive
years, you would expect the population size to ____ after 20 years. - ANSWER
increase
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 ~800
Which scenario exhibits high richness and low diversity? - ANSWER Big Cypress
preserve has dozens of species of bromeliads and orchids but the forest is
dominated by Cypress trees.
Species richness typically increases... - ANSWER as we travel from poles to the
equator.
You discover an ancient cave system that has been sheltered from climatic
forces for hundreds of thousands of years. How high do you expect species
richness to be inside the cave, compared to other cave systems that are similar
