Interdepence - B2

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  • Created by: Anjelala
  • Created on: 11-04-13 00:44
Why may similar animals compete?
Because they live in the same habitat and need to compete for resources such as food.
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Why may members of the same species compete for?
They compete for mates, so they can breed.
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What is an Ecological niche?
An Ecological niche describes the habitat an organism lives in and also it's role in the habitat.
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What type of organisms are more likely to compete ?
Organisms that share simlilar niches as they need similar resources.
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What are the two types of competition?
>Interspecific >Intraspecific
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What is 'Interspecific' Competition?
Interspecific is competition is between organisms and different species .
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What do both predators and prey show in their numbers?
They both show cyclical changes (ups and downs)
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Explain why cyclical changes occurs for predators and prey?
> When there are a lot of prey, more predators live and increase in numbers. >More predators eat more prey and the number of prey drops. >Less prey means that more predators starve and decrease in numbers.
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When do the predator peaks occur ?
After the peaks of the prey, as it takes time for the increased amount of food to allow more predators to survive and reproduce.
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What do parasites feed on?
They feed on or in another living organisms called the host.
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Give an example of a parasite and it's host.
Tapeworms are parasites , they feed in the digestive systems of animals.
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Give a brief explanation of the relationship between a parasite and it's host.
Parasites feed on or in the host, causing the host to suffer and eventually die.
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Why may a parasite not kill its host quickly?
Because it is successfully adapted
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What is mutualism?
Mutualism is when both organisms benefit as a result of their relationship.
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Give an example of mutialism.
Insects transfer a flower's pollen so pollination can happen, and in return they get the nectar from the flower.
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What lives in the nodules of pea plants?
Nitrogen fixing bacteria
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How does a pea plant and certain bacteria benefit from mutualism?
> Nitrogen fixing bacteria turn nitrogen into nitrogen- containing chemicals and give some to the peas > In return the pea plant gives the bacteria sugars they produced by photosynthesis.
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Other cards in this set

Card 2

Front

Why may members of the same species compete for?

Back

They compete for mates, so they can breed.

Card 3

Front

What is an Ecological niche?

Back

Preview of the front of card 3

Card 4

Front

What type of organisms are more likely to compete ?

Back

Preview of the front of card 4

Card 5

Front

What are the two types of competition?

Back

Preview of the front of card 5
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