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47 Cards in this Set
- Front
- Back
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What is a habitat |
The place an organism lives |
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What’s a species |
A group of genetically similar organisms that can interbreed to produce fertile offspring |
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What’s a population |
Is a group of organisms of one species living in one area |
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What’s a community |
A community is all of the animals and plants that are living in one area. |
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Ecosystem definition |
An ecosystem consists of all the organisms living in a particular area and the non-living components with which they interact.
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Niche definition |
A niche is the role that an organism plays within a community.
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Biodiversity definition |
The total variety of living things in a particular area |
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Producers |
Producers are green plants that are able to produce their own food by converting light energy from the sun into chemical energy by photosynthesis. |
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Producers |
Producers are green plants that are able to produce their own food by converting light energy from the sun into chemical energy by photosynthesis. |
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Consumers |
Animals cannot produce their own food from sunlight.
They are known as consumers because they must consume plants or other animals in order to obtain energy |
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Primary consumer |
A primary consumer is the first consumer in a food chain. They obtain their energy by eating green plants. |
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Secondary consumer |
A secondary consumer is the second consumer in a food chain. They obtain their energy by eating primary consumers. |
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Tertiary consumer |
A tertiary consumer is the third consumer in a food chain. They obtain their energy by eating secondary consumers. |
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Herbivore |
An animal which only eats plant material |
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Herbivore |
An animal which only eats plant material |
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Omnivore |
An animal that eats both animal and plant material |
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Herbivore |
An animal which only eats plant material |
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Omnivore |
An animal that eats both animal and plant material |
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Carnivore |
An animal that only eats animal material |
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Predator |
An animal which hunts another animal for its food is called a predator |
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Predator |
An animal which hunts another animal for its food is called a predator |
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Prey |
The hunted animal is called the prey. |
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Predator |
An animal which hunts another animal for its food is called a predator |
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Prey |
The hunted animal is called the prey. |
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Food chains definition |
A food chain always begins with a green plant (the producer) and is a relationship where one organism feeds on the previous one and in turn provides food for the next one in the series. Each arrow indicates the direction of energy flow. |
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Competition |
Competition occurs in an ecosystem when a particular resource is in short supply.
•Green plants may compete for light, water and soil nutrients
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Interspecific competition |
Interspecific competition occurs amongst individuals of DIFFERENT species.
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Intraspecific competition |
Intraspecific competition occurs amongst individuals of the same species competing for the same resources. Making it more intense than interspecific competition |
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How energy flow works |
When the plant is eaten by an animal (the primary consumer)energy is transferred from the plant to the animal When the first animal is eaten by a second animal (the secondary consumer) energy is again transferred and so on through a series of organisms |
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How energy flow works |
When the plant is eaten by an animal (the primary consumer)energy is transferred from the plant to the animal When the first animal is eaten by a second animal (the secondary consumer) energy is again transferred and so on through a series of organisms |
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What’s a pyramid of numbers |
A pyramid of numbers is a diagram that shows the total |
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How energy flow works |
When the plant is eaten by an animal (the primary consumer)energy is transferred from the plant to the animal When the first animal is eaten by a second animal (the secondary consumer) energy is again transferred and so on through a series of organisms |
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What’s a pyramid of numbers |
A pyramid of numbers is a diagram that shows the total number of organisms at each stage in a food chain Producer always goes at the bottom then primary consumer then secondary consumer then tertiary consumer |
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How is energy lost |
Through movement Heat Undigested materials |
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How much energy is lost and passed on through each stage |
Approximately 10% of energy is passed on at each stage , 90% is lost |
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Why does a pyramid of numbers form a pyramid |
The energy loss at each link in the food chain limits the quantity of living matter that can be supported at the next level |
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Why do we have irregular pyramid of numbers |
This is because the producer is a single large plant such as a tree |
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What’s a pyramid of energy |
A pyramid of energy illustrates the energy content at each level in a food chain and the transfer energy from one level to another |
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What’s a mutation |
A mutation is a random change to an organisms dna they are spontaneous and are the only source of new alleles |
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What’s a mutagenic agent |
The rate mutations can be increased by mutagenic agents such as radiation and chemical |
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What does variation mean |
A difference in phenotypes
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What causes variation within a population |
Mutation |
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What causes variation within a population |
Mutation |
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What does variation within a population do |
It makes it possible for a population to evolve over timeIn response to changing environmental conditions |
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What do the alleles produced by mutation help do |
It allows plant and animals to adapt to their enviroment |
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What’s an adaptation |
An adaptation is an inherited characteristics that makes an organism well suited to survival in it environment |
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What do adaptation help do |
They give an organism an advantage which increases their chance of survival |
