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27 Cards in this Set
- Front
- Back
3. What is a niche?
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the full range of physical and biological conditions in which an organism lives and the way in which the organism uses those conditions.
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4. In what ways is food part of an organism's niche?
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a niche includes the type of food the organism eats, how it obtains this food and which other species use the organism as food
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5.a. true or false
No two species can share the same niche in the same habitat |
true
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5.b. T or F
Different species can share the same niche in the same habitat |
F
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5.c. T or F
Two species in the same habitat have to share a niche to survive |
F
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5.d. T or F
Different species can occupy niches that are very similar |
T
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6. When does competion occur
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Competition occurs when 2 species compete for food if they occupy the same niche.
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7. What is a resource?
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any necessity of life, such as water, nutrients, light, food or space
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8. What is often the result of direct competition in nature?
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Direct competition in nature often results in a winner and a loser w/ the losing organism failing to survive.
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9. What is the competitive exclusion principle?
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States that no 2 species can occupy the same niche in the same habitat at the same time.
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10. What is predation?
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an interaction in which one organism captures and feeds on another organism.
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11. When predation occurs, what is the organism called that does the killing and eating, and what is the food organism called.
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When predation occurs, the organism that does the kiting and eating is called the predator and the food organism is called the prey.
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13.a. Decsribe Mutualism
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both species benefit from the relationship.
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13.b. Describe Commensalism
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1 member of association benefits and other neither helped nor harmed.
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13.c. Describe parasitism
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1 organism lives on/inside another organism and harms it.
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14. The organism from which a parasite obtains nutritional needs is called a (an) BLANK
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Host
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15.a. T or F
Parasite generally weaken but do not kill their host. |
T
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15.b. T or F
Parasites obtain all or part of their nutritional needs from the host. |
T
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15.c. T or F
Parasites neither help nor harm the host. |
F
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15.d. T or F
Parasites are usually smaller than the host. |
T
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16. What is ecological succession?
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gradual changes in living communities that follows a disturbance.
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18. The first species to populate an area when primary succession begins are called?
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pioneer species.
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1.b. Define Abiotic factors
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physical, or nonliving factors that shape an ecosystem
ex. climate, wind, nutrient availability, sunlight |
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1.a. Define Biotic factors
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biological influence in organisms within an ecosystem.
Ex. ecological community |
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2. What do the biotic and abiotic factors together determine?
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Together biotic and abiotic factors determine the survival and growth of an organism and the productivity of the ecosystem in which the organisms live.
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12. What is symbiosis?
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any relationship in which 2 species live closely together.
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17. What is primary succession?
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on land, succession that occurs on surfaces where no soil exists.
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