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7 Jun 2018

Human Population Growth and Environmental Stability:

a) How does population size affect the resources used by a country?

b) How does population size affect other environmental conditions?

c) Are there other factors besides population size that can have an impact on resource consumption and environmental conditions in a country?

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Hubert KochLv2

8 Jun 2018

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Related questions

1. Which of the following risks is the result of random variation in the survival and production of offspring and is especially of concern for a small population?

A. Genetic drift

B. Environmental stochasticity

C. Inbreeding depression

D. Demographic stochasticity

2. Imagine you are a marine biologist and you want to estimate the population size of sea otters in your study area. Which of the following method would be the best approach to do this?

3. You captured and tagged 15 otters on Day 1. A month later, you resample the area and catch 30 otters, of which 3 are tagged. What is the estimated total population size?

4. If you used a mark-recapture approach to estimate the size of an animal population, but the tags were defective and fell off some of the originally sampled individuals, the method would tend to:

A. Underestimate the true population size

B. Overestimate the true population size

C. Either underestimate or overestimate the true population size, depending on how many individuals lost their tags

D. None of the above

5. Which of the following affect population size?

A. Birth, death

B. Birth, death, immigration, emigration

C. Birth, death, immigration, emigration, speciation

D. Birth, death, genetic drift

E. None of the above

Factors whose impact on a population increases as population size increases are known as: a. Limiting factors b. Life-history factors c. Distribution factors d. Density-dependent factors 7. Deer mice are a species with individuals who live short lives and grow up rapidly. They have many, small offspring to which they give little parental care. This life-history strategy describes: a. r-selected species b. K-selected species 8. Which type of species is more likely to have its population size remain close to carrying capacity under normal conditions, rather than going through boom and bust cycles? a. density-dependent species b. r-species c. K-species d. prey species 9. In top-down regulation, the size of a rabbit population is determined by: a. The number of foxes and coyotes in the area b. The severity of winter c. The amount of food found in their habitat d. The biotic potential of female rabbits 10. In the Yellowstone ecosystem, what regulates the size of the elk populations? a. Bottom-up regulation factors b. Top-down regulation factors c. In some cases it is bottom-up and in other cases it is top-down regulation. d. Neither one have a significant impact on elk population size.

ultramarinetermite85

Question :Mutations that cause sickness and/or death after reproduction has occurred:

Question 1

options: can be passed on to future generations.

will not be passed on to future generations. are unlikely to occur.

are only passed on to future generations in species that have short life spans.

Question 2

In a population exhibiting logistic growth, what happens when the carrying capacity is exceeded?

Question 2 options:

The growth rate becomes zero until the population is back within the carrying capacity.

The growth rate becomes negative until the population is back within the carrying capacity.

The population crashes and becomes extinct.

The population's fertility drops to zero.

Question 3 How does exponential growth differ from logistic growth?

Question 3 options:

Logistic growth models take the population's age structure into account.

Long-term exponential growth is more commonly observed than long-term logistic growth in nature.

The logistic model of growth incorporates environmental limitations on population size.

Logistic growth generally comes with infinite expansion.

Question 4 Density-dependent and density-independent growth factors influence the size of a population by causing changes in the:

Question 4 options:

death rate and pattern of dispersion.

birth rate and death rate.

age structure and birth rate.

carrying capacity and age structure.

Question 5 The life history of an organism does not include the organism's

Question 5 options:

reproduction

All of these are included in an organism's life history.

death

birth

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