Question 1 Select one answer. 10 points In which age were domestic animals first

Question

Question 1

Select one answer.

10 points

In which age were domestic animals first used as a major source of energy, extending the ability of humans to impact the environment?

Stone Age

Agricultural Age

Industrial Age

Question 2

Select one answer.

10 points

Which of the following is likely to be a foundation species?

Lions

Sea Otters

Oak Trees

All of these

Question 3

Select one answer.

10 points

Three anglers are arguing about how a lake’s fish population should be managed. Historically the lake has been totally closed to human fishing. For many years it has held a steady population of about 100,000 fish. Managers are planning to open the lake to fishing with a limited harvest. To decide on the harvest limits, they first need to set a goal. Select the strategy that would probably generate the largest sustainable harvest of fish each year.

Angela thinks that having a lot of fish in the lake is the most important thing. She thinks the population should be kept close to 100,000 fish and rules should be set so that the number never drops below 90,000.

Ricardo thinks that it would be better to have a moderate number of fish. He thinks that the population should be kept close to 60,000 fish and rules should be set so that the number never drops below 50,000.

Frank thinks that it is most important to keep the population small so the fish won’t compete with each other. He thinks the population size should be kept close to 20,000 and rules should be set so it will not fall below 10,000.

Question 4

Select all that apply.

10 points

Which actions could be taken to help increase a population of an endangered species? Select all that apply.

Breed individuals in captivity and release their offspring to suitable habitats.

Protect the species against hunting, fishing, or gathering.

Introduce predators that kill and eat the species, thereby preventing overpopulation.

Introduce insects that pollinate an endangered plant, increasing its rate of seed production.

Use contraceptive darts to reduce the birth rate so the population stays at its carrying capacity.

Question 5

Select one answer.

10 points

Respiration and photosynthesis are an essential part of which biogeochemical cycle?

Nitrogen

Carbon

Phosphorus

Water

Question 6

Select one answer.

10 points

Which of the following have changed at a time and in a way that can explain recent climate warming?

The shape of Earth’s orbit around the sun and the tilt of the Earth on its axis.

Greenhouse gas levels in the air.

Solar activity as part of the sunspot cycle.

Volcanic activity.

Question 7

Select one answer.

10 points

Which of the following demonstrates exponential growth?

2, 8, 14, 20, 26

2, 4, 8, 16, 32

2, 4, 6, 8, 10

2, 4, 2, 8, 3

Question 8

Select one answer.

10 points

Which of the following communities has the greatest species richness?

Community A: 109 species and 22,948 total organisms

Community B: 89 species and 39,946 total organisms

Question 9

Select one answer.

10 points

Which complicated cycle includes several different processes that are carried out by bacteria in the soil and water?

Phosphorus cycle

Carbon cycle

Nitrogen cycle

Water cycle

Question 10

Select one answer.

10 points

What is the per capita birth rate for 2010?

2.6

0.004

0.4

38

Question 11

Select all that apply.

10 points

Which of the following are probably members of a pond’s ecological community? Select all that apply.

a population of fish that live in the pond

a population of plants (lily pads) that live in the pond

dissolved oxygen gas in the pond water

a population of birds (great blue herons) that feed on the pond’s fish

a population of birds that live in a forest near the pond but do not have any contact with or important influence on the pond’s organisms

Question 12

Select one answer.

10 points

Birds feed on honeysuckle berries, spreading the seeds to new places where they can sprout and grow. This relationship is an example of...

mutualism.

predation.

competition.

Question 13

Select one answer.

10 points

In the diagram below, the toad is at trophic level...

3

4

5

2

1

Question 14

Select one answer.

10 points

What is the currently accepted scientific explanation for anthropogenic global climate change?

The hole in the ozone layer lets in too much sunlight, warming the earth.

Heat escapes from engines, forest fires, machinery, power plants, etc.

Human activities raise greenhouse gas levels and strengthen the greenhouse effect.

Question 15

Select one answer.

10 points

The following are estimates from the U.S. Census Bureau’s International Database. They are averages for populations in two different groups of countries in 2012.

Group A: Total fertility 1.6 births per woman over a lifetime, life expectancy 78 years at birth, and population growth rate 0.3 % per year.

Group B: total fertility 2.6 births per woman over a lifetime, life expectancy 66 years at birth, and population growth rate 1.3 % per year.

Which group represents the population of less developed countries, including most of Africa, Asia, and Latin America?

Members of Group A are from the less developed (lower income) nations.

Members of Group B are from the less developed (lower income) nations.

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Submit and Finish

Yellowstone Wolf Project Annual Report 2010 Variable Value in 2010 N (population size) 97 annual number of births 38 annual number of deaths 9 total land area 8,987 km 2

Explanation / Answer

1) Agricultural Age

2) Oak Trees

3) The strategy that would probably generate the largest sustainable harvest of fish each year is that Ricardo thinks that it would be better to have a moderate number of fish. He thinks that the population should be kept close to 60,000 fish and rules should be set so that the number never drops below 50,000.

4) The actions that could be taken to help increase a population of an endangered species are:

Breed individuals in captivity and release their offspring to suitable habitats.

Protect the species against hunting, fishing, or gathering.

Introduce insects that pollinate an endangered plant, increasing its rate of seed production.

5) Carbon

6) Greenhouse gas levels in the air

7) 2, 4, 8, 16, 32

8) Community A: 109 species and 22,948 total organisms

9) Phosphorus cycle

11) A. a population of fish that live in the pond

12) Mutualism

13) 4

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