B2

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What group comes between 'family' and 'species' when classifying organisms?
genus
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Give two reasons why classification systems change over time
1) Newly discovered species 2) DNA sequencing
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What is a species?
A group of organisms which can interbreed to produce fertile offspring
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What is the binomial system?
In the binomial system each species is given a 2 part latin name. Its used by scientist all around the world, scientist who speak different languages can refer to a particular species by the name
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Why might two unrelated species look very similar?
they might share common ancestors
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What does each bar on a pyramid of biomass represent?
Shows the mass of living material at the stage of the food chain how much all the organisms at each level would weigh if you put them all together)
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Give two ways that energy is lost at each stage in the food chain
1) respiration 2) some energy will pass out in waste
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Why is it unusual to find a food chain with more than five trophic levels?
So much energy is lost at each stage that there's not enough left to support more organisms after four or five stages
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What is interspecific competition?
Is where organisms compete for resources against individuals of another species
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What is infraspecific competition?
Organisms compete for resources against individuals in the same species
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What is the difference between a parasitic and mutualistic relationship?
Parasites live off a host, take what they need to survive often harming the host (Fleas). Mutualism, both organisms benefit (oxpeckers)
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'In a habitat with stable conditions, specialists will out-compete generalists' True or False?
True
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Describe how extremophile bacteria are able to survive very high temperatures
They have enzymes that work best at a much higher optimum temperature than enzymes from other organisms
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What are anti freeze proteins?
Organisms that live in very cold environments, these proteins interfere with formation and growth of ice crystals in the cells
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How does having a small surface area to volume ratio help organisms to keep warm in cold climates?
This reduces heat loss as less body heat can be lost through the surface of the skin
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Describe two ways that desert plants are adapted to survive in dry conditions
Have a rounded shape, giving them a small surface area to volume ratio to minimize water loss. Store water in there stems to allow them to survive drought
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Describe Darwins theory of evolution
Theory of natural selection,
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Other cards in this set

Card 2

Front

1) Newly discovered species 2) DNA sequencing

Back

Give two reasons why classification systems change over time

Card 3

Front

A group of organisms which can interbreed to produce fertile offspring

Back

Preview of the back of card 3

Card 4

Front

In the binomial system each species is given a 2 part latin name. Its used by scientist all around the world, scientist who speak different languages can refer to a particular species by the name

Back

Preview of the back of card 4

Card 5

Front

they might share common ancestors

Back

Preview of the back of card 5
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