Levels of Ecological Organization. 1. The chart below shows three ecological terms used to describe levels of organization on Earth.

Transcription

1 Name Levels of Ecological Organization Date 1. The chart below shows three ecological terms used to describe levels of organization on Earth. Which diagram best represents the relationship of these ecological terms? A) B) C) D) 2. A fundamental concept of ecology is that living organisms A) are independent and do not interact with each other or with the physical environment. B) do not interact with other living organisms, but do interact with the physical environment C) interact with each other, but do not interact with the physical environment D) interact with other living organisms and interact with the physical environment 3. A stable ecosystem is characterized by having A) predators that outnumber their prey B) a continual input of energy C) limited autotrophic nutrition D) no competition between species 4. Which diagram best illustrates the relationship between humans (H) and ecosystems (E)? A) B) C) D) 5. The portion of Earth in which all life exists is known as A) the climax stage B) the biosphere C) a population D) a biotic community 6. The study of the interactions between organisms and their interrelationships with the physical environment is known as A) ecology B) cytology C) embryology D) physiology 7. The organisms in a pond and the physical factors influencing them best describe A) a population B) an ecosystem C) a biosphere D) a food chain 8. Which group can best be described as a population? A) all the honeybees in an orchard B) all the plants and animals in a forest C) the living and nonliving factors in a meadow D) the life in Earth's atmosphere

2 9. The diagram below represents many species of plants and animals and their surroundings. What does the diagram best represent? A) a population B) a community C) an ecosystem D) the biosphere 10.Which statement concerning an ecosystem is correct? A) It can exist with or without a constant source of energy input. B) It must contain consumers but can exist without producers. C) It involves interactions between biotic and abiotic factors. D) It can exist on land, but it cannot exist in lakes, rivers, or oceans. 11. All the red foxes inhabiting a given forest constitute a A) population B) community C) biome D) biosphere 12. A particular species of freshwater mussel (a small clam-like animal) inhabits the shallow water of a large lake, where it lives and breeds. These mussels are referred to as A) a population B) an ecosystem C) an abiotic condition D) an aquatic biome 13. A group of organisms within a given area capable of interbreeding and producing fertile offspring under natural conditions is called A) an ecosystem B) a community C) a food web D) a population 14. A moss-covered log is overturned by a hungry bear looking for insects to eat. The bear disturbs an ant colony, and some chipmunks leave the hollow log to search for another home in the forest. Which relationship do these organisms have with each other? A) They are all of the same species. B) They all require the same type of food. C) They are part of a community. D) They are abiotic factors in a forest. 15. Base your answer to the following question on The diagram below shows a milkweed plant and some of the insects that live on it or visit it. Which term best describes the group of organisms in the diagram? A) biosphere B) community C) habitat D) biome

3 16. Base your answer to the following question on The diagram below shows organisms in and around a pond. Which ecological term refers to all the organisms shown in the diagram? A) heterotroph B) community C) population D) producer 17. All the plants and animals interacting in a given area make up a A) community B) population C) biosphere D) species 18. Which sequence shows increasing complexity of levels of ecological organization? A) biosphere, ecosystem, community B) biosphere, community, ecosystem C) community, ecosystem, biosphere D) ecosystem, biosphere, community 19. What are the abiotic factors that characterize a forest ecosystem? A) light and biodiversity B) temperature and amount of available water C) types of procedures and decomposers D) ph and number of heterotrophs 20. Abiotic factors that could affect the stability of an ecosystem could include A) hurricanes, packs of wolves, and temperature B) blizzards, heat waves, and swarms of grasshoppers C) droughts, floods, and heat waves D) species of fish, number of decomposers, and supply of algae 21. Which factor has the greatest influence on the type of ecosystem that will form in a particular geographic area? A) genetic variations in the animals B) climate conditions C) number of carnivores D) percentage of nitrogen gas in the atmosphere 22. Which level of biological organization includes the greatest total number of species? A) community B) ecosystem C) population D) biosphere

4 23. One biotic factor that affects consumers in an ocean ecosystem is A) number of autotrophs B) temperature variation C) salt content D) ph of water 24. One biotic factor that limits the carrying capacity of any habitat is the A) availability of water B) level of atmospheric oxygen C) activity of decomposers D) amount of soil erosion

5 Answer Key Ecology Levels of Organization Abiotic and Biotic factors 1. A 2. D 3. B 4. B 5. B 6. A 7. B 8. A 9. C 10. C 11. A 12. A 13. D 14. C 15. B 16. B 17. A 18. C 19. B 20. C 21. B 22. D 23. A 24. C