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biology
bioilogy unit 3 life on earth
| what are biomes | a biome is a region of the earth which has same climate of fauna and flora |
| name 2 factors that can influence the distribution of biomes | temperature and rainfall |
| what are ecosystems made up of | habitat and a community |
| what is an ecosystem | ecosystems are an are where animals live |
| is inter dependence depending on something for more or less help | less help |
| what do animals and micro organisms depend on plants for | a source of oxygen |
| what do plants and animals depend on micro organisms for | recycling minerals |
| what do plants depend on animals for | seed dispersal |
| name the 3 factors which affect biodiversity | biotic , abiotic and human |
| what is a biotic factor | a living factor which affects biodiversity |
| name 3 biotic factors | grazing , disease , food , habitat |
| what is an abiotic factor | a non living factor which affects biodiversity |
| name 2 abiotic factors | pH , light intensity , temperature |
| name a way in which humans make less biodiversity | pollution , burning fossil fuels , deforestation |
| how do u measure pH | by using a pH meter |
| how do u make the experiment more reliable when using a pH meter | wipe probe between reading for better results |
| what is a niche | a niche Is the role an organism plays within a community |
| name the 3 interaction between organism's in a community | predation , competition , parasitism |
| when dose competition occur | when resources run out |
| what will plants growing in the same habitat compete for | sun light , water , space , food |
| name the 2 types of competition | interspecific and intraspecific |
| which one is worse intraspecific or interspecific | intraspecific |
| 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 |
| what is parasitism | when there is a relationship between 2 species where one benefits at expense with out killing it |
| what is a producer | a green plant which can make its own food by photosynthesis |
| what is a consumer | consumers are organisms that eat other organisms for a source of energy |
| what do herbivores eat | they only eat plants |
| what do omnivores eat | plants and animals |
| give a example of a omnivore | bird |
| give a example of a herbivore | rabbit |
| name the technique which is used to sample plants | quadrat |
| name a technique which is used to sample insects | pit fall trap |
| name a limitation for a pit fall trap | organisms might eat each other |
| name a limitation for using a quadrat | slow |
| describe the human population in the past 2000 years | rapidly increasing |
| what vital services do ecosystems provide | food , raw materials , medical resources , water |
| what does endangered mean | a species which is threatened with extension |
| name a endangered specie | panda , polar bear , tiger |
| what do arrows in the food chain show | direction of energy flow |
| in every level of the food chain how much energy gets passed on | 10% |
| what is a ecological pyramid | they are diagrammatic pictures of a food chain |
| what is a diagram of bio mass | a diagram showing the mass of each organism at each successful level in a food chain |
| what is a diagram of energy | it is a diagrammatic representation of food chains energy at each successful levelling the food chain |
| what is a mutation | a mutation is a change of structure or number of chromosomes in the body |
| what is a mutagenic agent | is what increases the rate of a mutation |
| name 2 mutagenic agent | gamma , x rays , UV lights |
| what is natural selection | it is that the best adapted survive to there surroundings and produce fertile offspring's |
| what is a specie | they are organisms which are able to interbreed and produce fertile offspring |
| what is speciation | speciation is a process which allows new species to develop |
| what does nitrifying bacteria do | take ammonium into the soil |
| what does de nitrifying bacteria do | takes bacteria from the soil and turns it into nitrogen gas |
| what do decomposers do | decompose dead plants or animal |
| what does free fixing bacteria do | takes nitrogen gas from the air and puts them in the soil |
| name a way in which farmers try to achieve a faster yield | by intensive farming |
| what is intensive farming | it is a method which makes farmers produce more food from the same land |
| what do fertilisers do | they make the plants grow better and become stronger |
| name the 3 main fertilisers | nitrogen , potassium , phosphors |
| what is nitrogen used for | the growth of green leaves |
| what is phosphors used for | the growth of roots |
| what is potassium used for | to make fruits and flowers grow faster |
| what happens if fertilisers leak into a lake or river | algae bloom happens |
| what are pesticides used for | killing pests such as lady birds |
| what are GM crops | genitivally modified crops |
Created by:
aliakbar1
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