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1. Bacteria and fungi are important in the environment because
A. some convert nitrogen to a form used by plants.
B. some return nutrients from the remains of organisms to the soil.
C. some break down the remains of organisms.
D. all of the above




2. The main layers of a tropical rain forest are
A. top trees, middle canopy, epiphytes, and lower canopy.
B. emergent trees, upper canopy, lower canopy, and understory.
C. high canopy, emergent trees, middle canopy, and understory.
D. upper level, middle level, lower level, and bottom level.




3. Humans affect the carbon cycle by
A. burning fossil fuels.
B. burning wood.
C. driving vehicles.
D. all of the above




4. Consumers are dependent on producers because
A. producers are easy to catch.
B. producers put fiber in their diet.
C. consumers get their energy from eating producers and other consumers.
D. consumers make their own food.




5. An ecological succession is a
A. surface where an ecosystem has previously existed.
B. linear diagram of all the species located in a particular community.
C. gradual process of change and replacement of the types of species in a community.
D. surface where no ecosystem existed before.




6. Which of the following terms is used to describe a linear sequence in which energy is transferred from one organism to the next as each organism eats another organism?
A. trophic level
B. food web
C. energy pyramid
D. food chain




7. Which of the following describes factors that determine where an organism lives in an aquatic ecosystem?
A. available food, carbon dioxide, plankton, benthos
B. temperature, nutrients, sunlight, oxygen
C. plants, carbon dioxide, other organisms present, nutrients
D. zone, eutrophication, nekton, oxygen




8. Carbon enters a ____________ cycle in the ecosystem when producers such as plants convert carbon dioxide in the atmosphere into carbohydrates during photosynthesis.
A. long-term
B. fast
C. short-term
D. none of the above




9. Which of the following is an example of ecological succession?
A. a planted shrub growing on a patio
B. mosses covering the floor of an old building
C. a tomato plant planted in a garden
D. none of the above




10. Why are biomes named for the plants found in them?
A. a biome consists of only one ecosystem
B. the plants that grow within an area determine the other organisms that can live there
C. it is easier for scientists to categorize them
D. the plants found in them are specific only to that area




11. Which of the following is NOT a characteristic of a tropical rain forest?
A. nutrient-poor soil
B. humid and warm temperatures
C. lower number of species and plants than other biomes
D. receives about 200 to 450 cm of rain per year




12. Which of the following does NOT represent two functions of freshwater wetlands?
A. serve as a location for collection of sea shells; are a habitat for salt water inhabitants
B. provide spawning grounds for fish; provide recreational areas for people
C. trap and filter pollutants; absorb excess water
D. buffer shorelines against erosion; are a habitat for endangered plants and animals




13. A ______________ is located in tropical and subtropical areas near the equator, and receives hardly any rainfall.
A. chaparral
B. temperate grassland
C. savanna
D. desert




14. Which of the following is an abiotic factor in an ecosystem?
A. plants
B. bacteria
C. fungi
D. water




15. A group of species that live in the same place and interact with each other is called a
A. species.
B. community.
C. colony.
D. habitat.




16. Consumers are organisms that
A. get food by eating others.
B. get solar or other energy indirectly.
C. are also known as self-feeders.
D. occupy an ecosystem's lowest energy level.




17. A biome where the winters are very long and the summers are short is called a
A. grassland.
B. chaparral.
C. tundra.
D. none of the above




18. All of the following are characteristics of coral reefs EXCEPT that they
A. are made from limestone ridges built by coral polyps.
B. have rocky and sandy shores.
C. are home to thousands of species of plants and animals.
D. have tentacles that emerge to capture food.




19. All of the following are characteristics of oceans EXCEPT that
A. the open ocean is one of the most productive ecosystems.
B. ocean water absorbs light down to 100 m.
C. the open ocean is one of the least productive ecosyst
i am 26, i am a teacher. i have nothing to cheat on. this is a text i wrote for my students. i always post them on here to see if they are okay tests and if people can understand them and get the answers correct, thankyou very much.

Stop trying to cheat and get the answers from other people and do it yourself.

2009-12-29 13:40:27 by shawtyy

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