Download Unit 5 Pre and Post Test

Unit 5 Pre and Post Test
Multiple Choice
Identify the choice that best completes the statement or answers the question.
____
1. Which of the following is a biotic factor in the prairie ecosystem?
a. water
b. sunlight
c. soil
d. grass
____
2. The place where an organism lives and that provides the things the organism needs is called its
a. habitat.
b. population.
c. species.
d. community.
____
3. If you count 20 beetles in a garden measuring 5 square meters, the population density of the beetles is
a. 100 beetles per square meter.
b. 20 beetles per square meter.
c. 5 beetles per square meter.
d. 4 beetles per square meter.
____
4. Counting the number of organisms in a small area and multiplying to estimate the number in a larger area is
called
a. direct observation.
b. mark and recapture.
c. population density.
d. sampling.
____
5. A group of antelope leaving the herd in search of better grassland is an example of
a. immigration.
b. emigration.
c. increasing birth rate.
d. decreasing death rate.
____
6. An approximation of a number, based on reasonable assumptions, is called a(an)
a. biotic factor
b. limiting factor
c. immigration
d. estimate
____
7. An organism’s particular role in its habitat, or how it makes its living, is called its
a. carrying capacity.
b. ecosystem.
c. competition.
d. niche.
____
8. The behaviors and physical characteristics of species that allow them to live successfully in their environment
are called
a. habitats.
b. limiting factors.
c. biotic factors.
d. adaptations.
____
9. When a jellyfish paralyzes a tiny fish with its poisonous tentacles, the fish is the
a. predator.
b. prey.
c. host.
d. parasite.
____ 10. A close relationship between two species that benefits at least one of the species is called
a. natural selection.
b. symbiosis.
c. adaptation.
d. competition.
____ 11. The Escherichia coli that live in your intestine and help break down food are an example of which type of
interaction?
a. competition
b. mutualism
c. parasitism
d. predation
____ 12. An early winter frost preventing further growth in a tomato garden is an example of
a. carrying capacity.
b. a limiting factor.
c. a biotic factor.
d. indirect observation.
____ 13. All of the following are examples of limiting factors EXCEPT
a. food.
b. soil.
c. space.
d. weather conditions.
____ 14. An organism’s habitat must provide all of the following EXCEPT
a. food.
b. water.
c. predators.
d. shelter.
____ 15. The nonliving parts of an ecosystem are called
a. populations.
b. organisms.
c. biotic factors.
d. abiotic factors.
____ 16. To carry out photosynthesis, algae and plants use the abiotic factors sunlight, carbon dioxide, and
a. soil.
b. salt.
c. water.
d. bacteria.
____ 17. Which of the following is an example of a predator adaptation?
a. a porcupine’s needles
b. a shark’s powerful jaws
c. a frog’s bright colors
d. a plant’s poisonous chemicals
____ 18. The study of how things interact with each other and with their environment is called
a. ecology.
b. photosynthesis.
c. community.
d. biotic studies.
____ 19. Mutualism, commensalism, and parasitism are the three types of
a. symbiotic relationships.
b. predation.
c. competition.
d. prey adaptations.
____ 20. Population density is defined as
a. an approximation of a number, based on reasonable assumptions.
b. the number of individuals of a population in a specific area.
c. the number of individuals moving into a population.
d. the smallest level of ecological organization.
____ 21. The series of changes that occurs after a disturbance in an existing ecosystem is called
a. primary succession.
b. secondary succession.
c. disturbance succession.
d. pioneer succession.
____ 22. The first species to populate an area where primary succession is taking place are called
a. secondary species.
b. primary species.
c. pioneer species.
d. succession species.
Modified True/False
Indicate whether the statement is true or false. If false, change the identified word or phrase to make the statement true.
____ 23. All of the members of a community belong to the same species. _________________________
____ 24. The carrying capacity is the smallest number of individuals in a population that can live in one area.
_________________________
____ 25. An insect looks like a leaf, so it blends in with its surroundings and is hard for predators to see. The insect’s
characteristic is an example of commensalism. _________________________
____ 26. The series of changes that occur in an area where no ecosystem previously existed is called primary
succession. _________________________
Completion
Complete each statement.
27. Scientists who study how living things interact with the environment are called ____________________.
28. Observing animal tracks is an example of ____________________ observation, which is used to estimate
population size.
29. If food is scarce, it becomes a(an) ____________________ factor that prevents population growth.
30. A hawk building a nest on the arm of a cactus without hurting the cactus is an example of the symbiotic
relationship called ____________________.
Short Answer
Use the diagram to answer each question.
31. Describe two things the prairie dogs need to live that they obtain from their habitat.
32. What is the smallest unit of organization in an ecosystem? Give one example from the diagram.
Use the diagram to answer each question.
33. How was the pheasant population changing at Point A?
34. Which letter marks the peak of the pheasant population?
35. In 1990, a large resort hotel was built on the island where these pheasants live. Explain how this might have
affected the pheasant population.