bioilogy unit 3 life on earth
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| what are biomes | a biome is a region of the earth which has same climate of fauna and flora
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| name 2 factors that can influence the distribution of biomes | temperature and rainfall
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| what are ecosystems made up of | habitat and a community
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| what is an ecosystem | ecosystems are an are where animals live
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| is inter dependence depending on something for more or less help | less help
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| what do animals and micro organisms depend on plants for | a source of oxygen
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| what do plants and animals depend on micro organisms for | recycling minerals
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| what do plants depend on animals for | seed dispersal
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| name the 3 factors which affect biodiversity | biotic , abiotic and human
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| what is a biotic factor | a living factor which affects biodiversity
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| name 3 biotic factors | grazing , disease , food , habitat
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| what is an abiotic factor | a non living factor which affects biodiversity
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| name 2 abiotic factors | pH , light intensity , temperature
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| name a way in which humans make less biodiversity | pollution , burning fossil fuels , deforestation
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| how do u measure pH | by using a pH meter
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| how do u make the experiment more reliable when using a pH meter | wipe probe between reading for better results
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| what is a niche | a niche Is the role an organism plays within a community
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| name the 3 interaction between organism's in a community | predation , competition , parasitism
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| when dose competition occur | when resources run out
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| what will plants growing in the same habitat compete for | sun light , water , space , food
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| name the 2 types of competition | interspecific and intraspecific
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| which one is worse intraspecific or interspecific | intraspecific
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| what happens when 2 different organisms occupy the same ecological niche | one wins and one dies the one that dies may be threatened with extension
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| what is parasitism | when there is a relationship between 2 species where one benefits at expense with out killing it
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| what is a producer | a green plant which can make its own food by photosynthesis
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| what is a consumer | consumers are organisms that eat other organisms for a source of energy
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| what do herbivores eat | they only eat plants
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| what do omnivores eat | plants and animals
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| give a example of a omnivore | bird
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| give a example of a herbivore | rabbit
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| name the technique which is used to sample plants | quadrat
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| name a technique which is used to sample insects | pit fall trap
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| name a limitation for a pit fall trap | organisms might eat each other
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| name a limitation for using a quadrat | slow
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| describe the human population in the past 2000 years | rapidly increasing
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| what vital services do ecosystems provide | food , raw materials , medical resources , water
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| what does endangered mean | a species which is threatened with extension
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| name a endangered specie | panda , polar bear , tiger
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| what do arrows in the food chain show | direction of energy flow
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| in every level of the food chain how much energy gets passed on | 10%
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| what is a ecological pyramid | they are diagrammatic pictures of a food chain
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| what is a diagram of bio mass | a diagram showing the mass of each organism at each successful level in a food chain
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| what is a diagram of energy | it is a diagrammatic representation of food chains energy at each successful levelling the food chain
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| what is a mutation | a mutation is a change of structure or number of chromosomes in the body
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| what is a mutagenic agent | is what increases the rate of a mutation
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| name 2 mutagenic agent | gamma , x rays , UV lights
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| what is natural selection | it is that the best adapted survive to there surroundings and produce fertile offspring's
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| what is a specie | they are organisms which are able to interbreed and produce fertile offspring
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| what is speciation | speciation is a process which allows new species to develop
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| what does nitrifying bacteria do | take ammonium into the soil
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| what does de nitrifying bacteria do | takes bacteria from the soil and turns it into nitrogen gas
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| what do decomposers do | decompose dead plants or animal
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| what does free fixing bacteria do | takes nitrogen gas from the air and puts them in the soil
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| name a way in which farmers try to achieve a faster yield | by intensive farming
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| what is intensive farming | it is a method which makes farmers produce more food from the same land
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| what do fertilisers do | they make the plants grow better and become stronger
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| name the 3 main fertilisers | nitrogen , potassium , phosphors
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| what is nitrogen used for | the growth of green leaves
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| what is phosphors used for | the growth of roots
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| what is potassium used for | to make fruits and flowers grow faster
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| what happens if fertilisers leak into a lake or river | algae bloom happens
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| what are pesticides used for | killing pests such as lady birds
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| what are GM crops | genitivally modified crops
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