Looking for help on these eight questions regarding ecology and population growt

Question

Looking for help on these eight questions regarding ecology and population growth and dynamics! Please just list the letter for each answer with the corrosponding question...

1.0 Points

You find that a population of parthenogenic insects reproduces once per year, with each female producing an average of 3 offspring, followed by the death of the female after reproducing. If the population was in the early stage of growth, before any density-dependence became important, the value of lambda, the finite rate of increase, for the population would be ___.

A. 300%

B. 2

C. 3

D. 100%

Question 2 of 10

1.0 Points

Density-independent processes, such as extreme weather events, forest fires, or natural disasters can result in population regulation.

True

False

Question 3 of 10

1.0 Points

In a logistically growing population, the rate of population growth is maximal when the size of the population is ___.

A. At one half of the carrying capacity, K/2

B. When the population is very small, near 0, and just beginning to grow

C. When the population is greater than K

D. At the carrying capacity, K

Question 4 of 10

1.0 Points

You observe that an exponentially growing population has a size of 10 individuals during an initial census, and at a census 2 years later the population has increased to 1000 individuals. The per capita exponential rate of increase, r, of the population is ___.

A. ~2.3025

B. ~99%

C. ~990

D. ~10

Question 5 of 10

1.0 Points

What information is needed to estimate the rate of population growth, r, from a life table?

A. age-specific survivorship and fecundity

B. sex ratio and stable age distribution

C. Age and survivorship

D. Age and survival

Question 6 of 10

1.0 Points

Delayed density dependence (time lags) can create what kind of population dynamics?

A. damped oscillations that return to an equilibrium

B. stable limit cycles

C. chaos

D. all of these patterns of dynamics

Question 7 of 10

1.0 Points

Simple theory predicts that metapopulations will persist indefinitely if __.

A. rates of extinction exceed rates of colonization

B. values of r are < 0

C. rates of colonization exceed rates of extinction

D. values of r are > 0

Question 8 of 10

1.0 Points

What factors may account for population extinctions?

A. small population size

B. inbreeding depression

C. high environmental variation

D. failure of Allee effects

E. all of these factors

1.0 Points

You find that a population of parthenogenic insects reproduces once per year, with each female producing an average of 3 offspring, followed by the death of the female after reproducing. If the population was in the early stage of growth, before any density-dependence became important, the value of lambda, the finite rate of increase, for the population would be ___.

A. 300%

B. 2

C. 3

D. 100%

Question 2 of 10

1.0 Points

Density-independent processes, such as extreme weather events, forest fires, or natural disasters can result in population regulation.

True

False

Question 3 of 10

1.0 Points

In a logistically growing population, the rate of population growth is maximal when the size of the population is ___.

A. At one half of the carrying capacity, K/2

B. When the population is very small, near 0, and just beginning to grow

C. When the population is greater than K

D. At the carrying capacity, K

Question 4 of 10

1.0 Points

You observe that an exponentially growing population has a size of 10 individuals during an initial census, and at a census 2 years later the population has increased to 1000 individuals. The per capita exponential rate of increase, r, of the population is ___.

A. ~2.3025

B. ~99%

C. ~990

D. ~10

Question 5 of 10

1.0 Points

What information is needed to estimate the rate of population growth, r, from a life table?

A. age-specific survivorship and fecundity

B. sex ratio and stable age distribution

C. Age and survivorship

D. Age and survival

Question 6 of 10

1.0 Points

Delayed density dependence (time lags) can create what kind of population dynamics?

A. damped oscillations that return to an equilibrium

B. stable limit cycles

C. chaos

D. all of these patterns of dynamics

Question 7 of 10

1.0 Points

Simple theory predicts that metapopulations will persist indefinitely if __.

A. rates of extinction exceed rates of colonization

B. values of r are < 0

C. rates of colonization exceed rates of extinction

D. values of r are > 0

Question 8 of 10

1.0 Points

What factors may account for population extinctions?

A. small population size

B. inbreeding depression

C. high environmental variation

D. failure of Allee effects

E. all of these factors

Explanation / Answer

1. Option C is correct.

Finite rate of increase = Final population size/Initial population szie = 3/1 = 3

2. True

Natural disasters can change population densities irrespective of their numbers.

3. Option A is correct.

The population size is maximum at K = 1

The population growth rate is maximum when K = 1/2

4. Option B is correct.

Per capita exponential rate of increase = Change in population/original population

= (1000 - 10)/10

= 990/10 = 99

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