Bio Lab - Quiz Questions

A population starts out at 250, and after 15 years is 2,500. What is the per capita growth rate of this population, assuming it has been growing continuously at a constant per capita rate?

0.15

A population exhibits a maximum per capita growth rate under unrestricted conditions of 0.4 per year. In theory, what per capita growth rate is it actually achieving, if its population size is 500 and the carrying capacity of the environment is 1000?

0.20

A population is exhibiting a per capita growth rate r of 0.2 per year. If the population size right now is 1,000, approximately what population size should we expect to see one year from now?

1,200

A certain population is exhibiting a per capita growth rate r of 0.02 per year. If its population size at the beginning of the year is 10,000, what will its population size be at the end of the year?

10,200

You perform a mark-recapture study and collect the following data: Number of animals marked and released: 10 Number of animals captured the second time: 20 Number of marked animals recaptured in the second sample: 2 What is the estimated size of the overall population?

100

You perform a mark-recapture study and collect the following data: Number of animals marked and released: 50 Number of animals captured the second time: 50 Number of marked animals recaptured in the second sample: 25 What is the estimated size of the overall population?

100

You perform a mark-recapture study and collect the following data: Number of animals marked and released: 100 Number of animals captured the second time: 100 Number of marked animals recaptured in the second sample: 10 What is the estimated size of the overall population?

1000

An ecologist captures 100 squirrels from the TCU campus and marks each one with a dab of paint behind the ear. A month later she captures another sample of 100 squirrels, of which 5 have the paint mark. Based on these data, what is the estimated size of the squirrel population in the study area?

2,000

A population exhibits a per capita growth rate r of 0.01 per year. If the population size in January 2021 was 2,000, approximately what population size should we expect to see in January 2022?

2,020

You perform a mark-recapture study and collect the following data: Number of animals marked and released: 50 Number of animals captured the second time: 500 Number of marked animals recaptured in the second sample: 10 What is the estimated size of the overall population?

2500

A population is growing continuously at a per capita rate of 0.15 per year. If the population right now is 1,000 individuals, what will the approximate population size be 10 years from now, if the per capita growth rate does not change?

4,500

You perform a mark-recapture study and collect the following data: Number of animals marked and released: 25 Number of animals captured the second time: 100 Number of marked animals recaptured in the second sample: 5 What is the estimated size of the overall population?

500

You perform a mark-recapture study and collect the following data: Number of animals marked and released: 50 Number of animals captured the second time: 50 Number of marked animals recaptured in the second sample: 5 What is the estimated size of the overall population?

500

You perform a mark-recapture study and collect the following data:Number of animals marked and released: 25Number of animals captured the second time: 100Number of marked animals recaptured in the second sample: 5What is the estimated size of the overall population?

500

A population starts out at 500, and after 8 years is 2,500. What is the per capita growth rate of this population, assuming it has been growing continuously at a constant per capita rate?

A) 0.05 B) 0.1 C) 0.2 D) 0.25 E) X 0.3

A population starts out at 100, and after 20 years is 15,000. What is the per capita growth rate of this population, assuming it has been growing continuously at a constant per capita rate?

A) 0.05 B) 0.1 C) X 0.2 D) 0.25 E) X 0.3

A population exhibits a maximum per capita growth rate under unrestricted conditions of 0.4 per year. In theory, what per capita growth rate is it actually achieving, if its population size is 500 and the carrying capacity of the environment is 2000?

A) 0.20 B) X 0.15 C) 0.30 D) 0.25 E) 0.10

A population is growing continuously at a per capita rate of 0.25 per year. If the population right now is 500 individuals, what will the approximate population size be 10 years from now, if the per capita growth rate does not change?

A) 1,200 OR B) 2,400

About how long would it take for a population of 100 individuals to reach a population size of 250, if it grows continuously at a per capita rate of 0.1 per year?

A) 3 B) 9 C) 14 D) X 23 E) 44

About how long would it take for a population of 250 individuals to reach a population size of 1,000, if it grows continuously at a per capita rate of 0.1 per year?

A) 3 B) 9 C) 14 D) X 23 E) 44

About how long would it take for a population of 100 individuals to reach a population size of 1,000, if it grows continuously at a per capita rate of 0.1 per year?

A) 3 B) X 9 C) 14 D) 23 E) 44

A population exhibits a maximum per capita growth rate under unrestricted conditions of 0.4 per year. In theory, what per capita growth rate is it actually achieving, if its population size is 500 and the carrying capacity of the environment is 800?

A) X 0.20 B) 0.15 C) 0.25 D) 0.30 E) 0.10

A population is growing continuously at a per capita rate of 0.25 per year. If the population right now is 200 individuals, what will the approximate population size be 10 years from now, if the per capita growth rate does not change?

A) X 1,200 B) 2,400 C) 4,500 D) 6,100 E) 10,000

Which of the following is correct with regards to logistic growth?

A) X The overall growth rate ΔN/Δt is highest when the population size is equal to K B) The per capita growth rate r increases as N approaches K C) The overall growth rate ΔN/Δt is not affected by the total population size D) The per capita growth rate r is higher when the population size is smaller

Which of the following will occur so long as a population maintains a constant positive per capita growth rate?

A) X The overall rate of population growth will remain constant over time B) The overall rate of population growth will decrease over time C) The overall rate of population growth will increase over time

A population is changing in size according to the trend ΔN/Δt = rN0. What can be said about this population?

It is exhibiting per capita growth

A population's size can be estimated by the equation N = Noe(rt). What can be said about this population?

It is growing exponentially

As part of a mark-recapture study, a researcher uses ear tags to mark a sample of deers from a deer population and then releases them back into the wild. Suppose that the ear tag makes the deer less attractive to potential mates. What outcome will this tend to have on the outcome of the study?

It will not tend to impact the estimate in any regular way

As part of a mark-recapture study, a researcher uses ear tags to mark a sample of deers from a deer population and then releases them back into the wild. Suppose that the ear tag makes the deer more attractive to potential mates present in the population (it does not attract them from elsewhere). What outcome will this tend to have on the outcome of the study?

It will not tend to impact the estimate in any regular way

As part of a mark-recapture study, a researcher uses ear tags to mark a sample of deers from a deer population and then releases them back into the wild. Suppose that some of the ear tags fall off over the course of the study. What outcome will this tend to have on the outcome of the study?

It will tend to result in an overestimate of the true population size (i.e., the estimated number will be too high)

As part of a mark-recapture study, a researcher uses ear tags to mark a sample of deers from a deer population and then releases them back into the wild. Suppose that the ear tags cause increased mortality among the marked deer (dead deer are not captured / counted). What outcome will this tend to have on the outcome of the study?

It will tend to result in an overestimate of the true population size (i.e., the estimated number will be too high)

As part of a mark-recapture study, a researcher uses ear tags to mark a sample of deers from a deer population and then releases them back into the wild. Suppose that the marked deer learn from the tagging experience how to avoid being captured. What outcome will this tend to have on the outcome of the study?

It will tend to result in an overestimate of the true population size (i.e., the estimated number will be too high)

As part of a mark-recapture study, a researcher uses ear tags to mark a sample of deers from a deer population and then releases them back into the wild. Suppose that the marked deer, having been so frightened, are more likely to move out of the area over the course of the study. What outcome will this tend to have on the outcome of the study?

It will tend to result in an overestimate of the true population size (i.e., the estimated number will be too high)

As part of a mark-recapture study, a researcher uses ear tags to mark a sample of deers from a deer population and then releases them back into the wild. Suppose that the marked deer, having been caught once, are then less afraid of capture, making them easier to catch than their unmarked friends. What outcome will this tend to have on the outcome of the study?

It will tend to result in an underestimate of the true population size (i.e., the estimated number will be too low)

Which of the following will increase the error associated with a mark-recapture study?

Marked and unmarked individuals are equally likely to migrate out of the area.

A population exhibits a per capita growth rate r of 0.1 per year. If the population size in January 2021 was 2,000, approximately what population size should we expect to see in January 2022?

NOT 2020 or 22000

In the equation r = rmax(1-(N/K)), what does K represent?

The carrying capacity of the environment

In the equation r = rmax(1-(N/K)), what does rmax represent?

The maximum per capita growth rate of the population

What does the equation r = rmax(1-(N/K)) describe?

The per capita growth rate of a population during logistic growth

A population is changing in size according to the trend ΔN/Δt = rN0. If r is positive and constant, which of the following must be true?

The population is exhibiting exponential growth

In the equation N = N0e(rt), what does the variable N0 represent?

The population size at the beginning of the time interval

In the equation N = N0e(rt), what does r represent?

The population's per capita growth rate

In the equation ΔN/Δt = rN0, what does r represent?

The population's per capita growth rate

In the equation ΔN/Δt = rN0, what does ΔN/Δt represent?

The population's total overall growth rate

A population is changing in size according to the trend ΔN/Δt = rN0. Which of the following will occur as long as r is positive and remains constant?

This population will exhibit J-shaped growth

When doing a mark-recapture study, a certain number of animals are marked in the first sampling round. What is the purpose of the second sampling round?

To determine the proportion of animals from the total population that were marked in the first round

A population's size can be estimated by the equation N = Noe(rt). What if instead we knew its change in size over time, but wanted to estimate its per capita growth rate r--how could we rearrange the equation to do that?

We would need to use the natural log ln

In a mark-recapture study, the larger the fraction of marked individuals recaptured in your second sample, the ______________ the total population size. Question options:

smaller