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Interactions in Ecos
Study Island answers/help (Interactions in Ecosystems)
| Question | Answer |
|---|---|
| How do ecosystems respond to natural disasters such as fires and floods? | They recover in stages, gradually returning to the original system. |
| How long can a healthy ecosystem remain stable? | hundreds or thousands of years |
| A cheetah hunts, kills, and eats a gazelle. This interaction is an example of _______. | predation |
| Examine the energy pyramid below. How does the first level affect the carrying capacity of the ecosystem? | The amount of energy in the first level determines how many animals can be supported on the subsequent levels. |
| Biodiversity may be lost as a result of many different factors. ..What is a consequence of the loss of biodiversity? | The local disappearance of one species can have a negative impact on the overall species richness of the community. |
| The picture below shows a portion of an ecosystem. Which of the following help to shape the ecosystem? | all of these |
| Which of the following is an example of a population? | a large clan of meerkats, including their offspring |
| Which of the following shows the organizational level of a biome from the broadest category to the most specific category? | biome → ecosystem → community → population → organism |
| During a process called __________, the destroyed acres of forest will gradually recover to support ecosystems that are very similar to the originals. | secondary succession |
| Cattle egrets often live in pastures among groups of livestock such as horses and cows. Which of the following terms best describes the interaction between cattle egrets and livestock? | commensalism |
| The American bullfrog is native to much of the eastern United States. The relationship between the American bullfrog and native frog species in the western United States can best be characterized as ______. | competition |
| There is an ecosystem that gets abundant sun, moderate temperatures and regular rain. What might you expect in this ecosystem? | Soil quality is likely very good. |
| Many kinds of plants depend on insects, such as moths, bees, wasps, and beetles, to perform pollination so they can reproduce. ..The biological relationship between a plant and its pollinator is known as _______. | mutualism |
| In any ecosystem, the basic resources that organisms need for survival are always in limited supply. Which of the following are potential effects of these limitations? | I and III only |
| Ecosystems change over time—even when they appear to be stable. What is the term for the predictable or orderly sequence of changes experienced by a community? | ecological succession |
| Theoretically, living organisms are capable of producing populations of infinite size. However, this never occurs because population sizes are limited by _______. | all of these |
| A massive flood tears out many trees in a wooded area. What would you expect the area to look like a year later? | Grasses and weeds will be growing in the sunny areas. |
| White-tailed deer are considered to be an overpopulated species in the central United States. Which of these events probably contributed the most to white-tailed deer exceeding their carrying capacity? | a large decrease in predators, such as wolves |
| A tick attaches to the flesh of a dog and feeds on the dog's blood for energy. ..The interaction described above is known as | parasitism. |
| Establishment of communities in newly formed environments, such as volcanic lava flows or sand bars, is called __________. Development of new communities in disturbed environments, such as a burned or clear cut forest, is called __________. | primary succession, secondary succession |
| Directions: Select each correct answer. More than one answer may be correct. Stable ecosystems can be altered, either rapidly or slowly, through which of the following events? | human activities, natural disasters, climatic changes |
| Two populations of birds in the same ecosystem begin to compete for the same food resources. What will most likely be the result of this interspecific competition? | There will be a reduction in the population size of one or both species. |
| Which of the following statements is true of all organisms in every environment? | They must compete for essential resources. |
| Which statement describes a forest ecosystem that has not experienced any natural disasters in the past 100 years? | They are fairly stable |
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_thequeenofoblivion_
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