A group of individuals of a single species that occupies a certain area is called a(n)

1. A group of individuals of a single species that occupies a certain area is called a(n) • ecosystem. • family. • population. • community.

2. A group of individuals of a single species that occupies a certain area is called a(n) • ecosystem. • family. • population. • community.

3. Which of the following would be a community-level study in ecology? • Which organisms are hunters on an African plain. • Which males in a group get to mate with the females. • How heavy rainfall affects the survival of the organisms of the southern California desert. • How amphibians respond to pollution.

4. Which of the following would be a community-level study in ecology? • Which organisms are hunters on an African plain. • Which males in a group get to mate with the females. • How heavy rainfall affects the survival of the organisms of the southern California desert. • How amphibians respond to pollution.

5. Where would hummingbirds appear on a food chain? (Hint: They eat nectar made by plants.) • Producers. • Primary consumers. • Secondary consumers. • Detritivores.

6. Where would hummingbirds appear on a food chain? (Hint: They eat nectar made by plants.) • Producers. • Primary consumers. • Secondary consumers. • Detritivores.

7. What form of symbiosis benefits one species of the interaction while having no effect on the other? • Mutualism. • Parasitism. • Symbiosis. • Commensalism.

8. What form of symbiosis benefits one species of the interaction while having no effect on the other? • Mutualism. • Parasitism. • Symbiosis. • Commensalism. Explanation: Commensalism is a form of symbiosis that benefits one species of the interaction while having no effect on the other. Mutualism benefits both species. Parasitism benefits one species at the expense of the other.

9. True or false?: The amount of organic matter in an ecosystem is sometimes referred to as its primary productivity. • True • False

10. True or false?: The amount of organic matter in an ecosystem is sometimes referred to as its primary productivity. • True • False Explanation: The amount of organic matter in an ecosystem is sometimes referred to as its biomass.

11. In an energy pyramid, there is less energy at the top of the pyramid because • not all the organisms at one trophic level are eaten by organisms at the next trophic level. • energy is lost to the environment as heat. • maintenance and producing feces use a lot of the energy an organism takes in. • all of the above.

12. In an energy pyramid, there is less energy at the top of the pyramid because • not all the organisms at one trophic level are eaten by organisms at the next trophic level. • energy is lost to the environment as heat. • maintenance and producing feces use a lot of the energy an organism takes in. • all of the above.

13. Every chemical reaction involves • maintaining body systems. • losing energy to the environment. • the destruction of a small amount of matter. • all of the above.

14. Every chemical reaction involves • maintaining body systems. • losing energy to the environment. • the destruction of a small amount of matter. • all of the above.

15. Which biome might be described as warm, moderately dry, grassy, and tropical? • Tundra. • Coniferous. • Chaparral. • Savanna.

16. Which biome might be described as warm, moderately dry, grassy, and tropical? • Tundra. • Coniferous. • Chaparral. • Savanna.

17. What do we call a habitat where freshwater areas join oceans? • The intertidal zone. • An estuary. • A reef. • A barrier island.

18. What do we call a habitat where freshwater areas join oceans? • The intertidal zone. • An estuary. • A reef. • A barrier island.

19. Which of the following biogeochemical cycles relies on bacteria to convert an element to usable form? • Nitrogen cycle. • Water cycle. • Carbon cycle. • Phosphorous cycle.

20. Which of the following biogeochemical cycles relies on bacteria to convert an element to usable form? • Nitrogen cycle. • Water cycle. • Carbon cycle. • Phosphorous cycle. Explanation: In order for living organisms to make use of nitrogen, it has to be converted into usable form. Living organisms rely on bacteria to accomplish this transformation.

21. What types of species can survive with few nutrients and little existing organic matter? • Climax community species. • Pioneer species. • Native species. • None of the above.

22. What types of species can survive with few nutrients and little existing organic matter? • Climax community species. • Pioneer species. • Native species. • None of the above.

23. According to the intermediate disturbance hypothesis, • regular disturbances limit biodiversity by destroying habitat. • regular disturbances encourage the invasion of nonnative species. • regular disturbances, if not too extreme, actually contribute to biodiversity. • all of the above.

24. According to the intermediate disturbance hypothesis, • regular disturbances limit biodiversity by destroying habitat. • regular disturbances encourage the invasion of nonnative species. • regular disturbances, if not too extreme, actually contribute to biodiversity. • all of the above.

25. Which of the following situations might encourage a population of trout to undergo exponential growth? • Introduction of a small population of trout to a lake without predators or competitors. • Overstocking of a population of trout in a lake. • Disease spreading through a population of trout. • Introduction of several bass into the lake.

26. Which of the following situations might encourage a population of trout to undergo exponential growth? • Introduction of a small populationof trout to a lake without predators or competitors. • Overstocking of a population of trout in a lake. • Disease spreading through a populationof trout. • Introduction of several bass into the lake.

27. What is carrying capacity? • The ideal number of individuals or population density in a habitat. • The usual number of individuals or population density the habitat supports. • The minimum number of individuals or population density the habitat can support. • The maximum number of individuals or population density the habitat can support.

28. What is carrying capacity? • The ideal number of individuals or population density in a habitat. • The usual number of individuals or population density the habitat supports. • The minimum number of individualsor population density the habitat can support. • The maximum number of individuals or population density the habitat can support.

29. A blue whale is an example of • an r-selected species. • a K-selected species. • a species that can vary its reproductive strategy based on environmental conditions. • a species with a strategy that is between r- and K-selected.

30. A blue whale is an example of • an r-selected species. • a K-selected species. • a species that can vary its reproductive strategy based on environmental conditions. • a species with a strategy that is between r- and K-selected.

31. Which statement is verifiable and true about the human population? • It is decreasing. • The rate of growth is declining. • It is beyond carrying capacity. • The rate of growth is increasing.

32. Which statement is verifiable and true about the human population? • It is decreasing. • The rate of growth is declining. • It is beyond carrying capacity. • The rate of growth is increasing.

33. During a demographic transition, • death rates decline first, followed by birth rates. • birth rates decline first, and then death rates decline. • birth rates decline, but death rates stay the same. • death rates and birth rates decline simultaneously.

34. During a demographic transition, • death rates decline first, followed by birth rates. • birth rates decline first, and then death rates decline. • birth rates decline, but death rates stay the same. • death rates and birth rates decline simultaneously.