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Dynam Ecosys Test
| Question | Answer |
|---|---|
| T/F: A community consists of all the organisms in an ecosystem that belong to the same species | False (Population) |
| All the meerkats that live in a wildlife refuge make up which of the following? | population |
| What is the difference between a population and a community? | A population is made up of only one species. A community is made up of all species in an area. |
| A male and female rabbit hop into a new area where there are no other rabbits. Before they can even find shelter, they are killed by a coyote. The existence of a predator is a _____ factor on the population of rabbits in the ares. | limiting |
| If there are no limiting factors, a population can reach its ______ | biotic potential |
| What is the effect of the growth of a population in an ecosystem? | fewer resources for each individual in the population |
| Living and nonliving parts of an environment together are referred to as a(n) ______ | ecosystem |
| Name THREE factors that can result in a decrease in the size of a population. | Resources, predators, disease, natural disasters |
| Compare and contrast a community and an ecosystem. | Both community and ecosystem have more than one species, but an ecosystem includes nonliving things too. |
| The Yellow Indian grass that grew in less dense areas would be ____ & ______ | higher in mass, higher in nitrogen level |
| T/F: Mutualism is any close relationship between different species. | False (Symbiotic Relationships) |
| Samantha plants some flowers in a flower bed and then ignores them. Soon weeds grow and the flowers die. The weeds had been able to get enough resources to survive, while the flowers had not. This is an example of _______ | competition |
| Some populations have cooperative relationships. This is where ______ | members of the same species work together for survival |
| Both owls and snakes preying on mice in a forest is an example of ____ | competition |
| A symbiotic relationship in which one species benefits and the other is not affected is called _______ | commensalism |
| A symbiotic relationship in which one species benefits and the other is harmed is a _______ relationship | parasitic |
| Hawks hunt and eat mice. Hawks and mice have a ________ relationship | predator-prey |
| Clownfish/Sea anemone: Clownfish get protection and sea anemone get food. What kind of symbiotic relationship? | mutualism |
| T/F Ecological succession can begin when seeds are carried to bare areas by birds or the wind. | True |
| T/F Ecological succession in new areas of land with little or no soil is secondary succession. | False (primary succession) |
| If an existing ecosystem is destroyed, _____ | secondary succession occurs |
| As eutrophication occurs, populations of algae grow. How does this speed up succession? | The algae use so much of the oxygen in the water that fish die, decay and add to the build up of soil. |
| The end product of aquatic succession is a new _______ ecosystem | land |
| A pasture gradually returns to a forested state. This is _______ succession | secondary |
| What is the difference between primary succession and secondary succession? | Primary succession has little to no soil and starts an ecosystem, secondary succession is an existing ecosystem that is destroyed and returns to its climax community. |
| What do lichens do to help create soil in primary succession? | Lichens release acid that breaks down rock to create soil. |
| After lava covers the land, ______ succession occurs. | primary |
| You play baseball in a field at the park where the grass is mowed all summer. What type of succession would occur if no one mowed the grass at all? | Secondary Succession would occur. |
| What would happen to the animals in a forest ecosystem after a forest fire? | Sharp drop in population, then a gradual rise in population as secondary succession occurs to return the populations to their carrying capacity. Eventually a climax community would return. |
Created by:
Kuiper
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