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Nat 5 Biology 3.1
Ecosystems
| Question | Answer |
|---|---|
| Define biodiversity | Variety and relative abundance of species resent in an ecosystem |
| Define population | Number of organisms of same species living in a defined area |
| Define species | Group of organisms (with similar characteristics), can interbreed to produce fertile offspring. |
| Define producer | Green plant, makes food by photosynthesis. |
| Define consumer | Animal which obtains energy by eating other organisms |
| Define herbivore | Consumer which eats plants only |
| Define carnivore | Consumer which eats animals only |
| Define omnivore | Consumer which eats both plants and animals |
| Define predator | Animal which obtains food by hunting and killing prey organisms |
| Define prey | Animal which is hunted and eaten by predator |
| Describe what a food chain represents | Energy flow from one organism to another during feeding. |
| State what the arrows in food chains represent | The direction of energy flow |
| Name what food chains generally start with | Producers |
| Describe what a food web represents | Interlinked food chains, showing how organisms in ecosystem are linked through feeding |
| Define ecosystem | All the organisms (community) living in a particular habitat, and the non-living components in which they interact. |
| If prey is removed from an food web, predict the effect on predators. | Decreased predators due to decreased food availably, or stay the same due if another food source available. |
| If predator is removed from food web, predict the effects on prey. | Increase due to decreased predation, or stay the same due to other predators present. |
| Define what a niche is | Role organism play in an ecosystem and interactions with other organisms in community. |
| Name the resources that are included in an organisms niche. | Competition, parasitism, predation, light, temperature, nutrient availability |
| Describe interspecific competition | Competition between different species for similar/common resources. |
| Describe intraspecific competition | Competition between same species for exact same resources. |
| Describe the differences between interspecific and intraspecific competition. | Interspecific is between different species for a similar/common resource, intraspecific competition is between same species for same resource. |
| Name what animals compete for | Resources, disease, food availability, grazing, predation, mates, territory. |
| Identify a characteristic of lions that makes them a good competitor | Sharp teeth/claws. |
| Name what plants compete for | Space, light, nutrients, minerals. |
| Cactus' long roots is a feature to help compete for...? | Water. |
| Large flowers are a feature to help compete for... | (attract) pollinators. |
| Rapid growth in height in weeds is a feature to compete for... | Light |
| Suggest why plants have different root depths. | Avoid competition for water/minerals. |
| State which type of competition is more intense, why? | Intraspecific competition, competing for the exact same resources. |
Created by:
MsKerrBiology
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