11 04 population ecology unit exam

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Question 1

  1. Which of the following population growth curves would be expected when no limiting factor is present?

3 points

Question 2

  1. The is the population size that can be maintained given a certain number of limiting factors:

3 points

Question 3

  1. The study of how organisms interact with their environment and with other organisms is called:

3 points

Question 4

  1. Every ecosystem carries out the basic processes of:

3 points

Question 5

  1. The biological role played by a species in its environment is called a:

3 points

Question 6

  1. Predators rarely kill and eat all available prey because:

3 points

Question 7

  1. _____ is an overabundance of nutrients that leads to excessive plant growth and reduction of oxygen in an ecosystem.

3 points

Question 8

  1. Which of these biomes receives the greatest amount of yearly rainfall?

3 points

Question 9

  1. An organism’s position within a food web is known as its:

3 points

Question 10

  1. Which of the following describes organisms in a pelagic zone?

3 points

Question 11

  1. Which of the following is NOT an example of secondary succession?

3 points

Question 12

  1. In a lake, the epilimnion is the:

3 points

Question 13

  1. Which characteristic best defines desert environments?

3 points

Question 14

  1. Tropical zones are characterized by:

3 points

Question 15

  1. Phosphate ions are primarily made available to organisms through:

3 points

Question 16

  1. Groundwater located in permeable layers of rock is a/an:

3 points

Question 17

  1. Given enough time, all water eventually returns to the:

3 points

Question 18

  1. Oceans are a reservoir for carbon stored as:

3 points

Question 19

  1. Greenhouse gases include which of these?

3 points

Question 20

  1. If nothing is done to control the level of greenhouse gases in the atmosphere, global temperature is expected to:

3 points

Question 21

  1. Oxygen and nitrogen gases comprise ___ percent of the atmosphere by volume.

3 points

Question 22

  1. ___ deposition can cause dead or dying lakes and forests.

3 points

Question 23

  1. Tropical rain forest destruction factors include:

3 points

Question 24

  1. ___ is a scientific discipline that develops practical approaches to prevent extinction of species and destruction of ecosystems.

3 points

Question 25

  1. Hydrothermal vent communities lack photosynthetic organisms at the base of the food web.

2 points

Question 26

  1. The rigid, outer layer of Earth is referred to as the asthenosphere.

2 points

Question 27

  1. In commensalism, one species benefits and the other neither benefits nor is harmed.

2 points

Question 28

  1. Increases in greenhouse gases cause increases in global temperature because these gases are able to trap heat reradiated from Earth’s surface.

2 points

Question 29

  1. Describe four human activities that have negative effects on Earth’s ecosystems. How do human activities increase the occurrence of species extinction?

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10 points

Question 30

  1. Why are scientists concerned about the loss of species as a result of human activities? Why would the extinction of other species negatively affect human society?

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