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B1 Classification
Edexcel B1 Classification
| Question | Answer |
|---|---|
| acquired characteristic | A characteristic that is changed by the environment rather than inherited from your parents |
| adaptation | Organisms have certain characteristics that allow them to survive in particular places |
| amphibians | Vertebrates that have moist, permeable skin and lay jelly-coated eggs in water. |
| autotrophic feeding | Make food from small molecules using an energy source, such as light in photosynthesis |
| bacteria | Simple organisms consisting of one cell that does not contain a nucleus, some of which are pathogens (singular: bacterium); they belong to the kingdom of prokaryotes |
| birds | Vertebrates that are homeotherm, have lungs, and lay hard-shelled eggs |
| characteristics | The features of an organism |
| Chloroplast | Green disc found in plant cells, which is used to make food for the plant using photosynthesis |
| chordate | Animals that have a supporting rod along the length of their body. All vertebrates belong to this group (also known as chordates) |
| chromosome | A long thread of a molecule called DNA. Each chromosome contains a series of genes along its length |
| classification | The process of sorting organisms into groups based on their characteristics |
| evolution | Gradual change over a period of time |
| extinction | The dying out of a species so that it no longer exists |
| fertiliser | Chemical compounds added by farmers to soil to increase the rate of growth of crops |
| fish | Vertebrates that have wet scales, gills and lay jelly-coated eggs. They are poikilotherm. |
| food web | A diagram of interlinked food chains that show how the feeding relationships in one habitat are independent |
| fossil | The remains or trace evidence of prehistoric living organisms |
| fungus | Organism that feeds on dead or decaying material |
| gene | A section of DNA that carries the instructions for a characteristic |
| genetic disorder | A disease cause by alleles |
| genetic variation | Variation in characteristics caused by the instructions within cells |
| genus | A classification group that contains species with similar characteristics (plural: genera) |
| heterotrophic feeding | Getting food by eating and digesting the tissues of other organisms |
| homeotherm | An animal that keeps its body temperature more constant than the surroundings, and often warmer, by releasing heat from reactions in the body |
| hybrid | An organism that is the result of breeding together two different species. A hybrid has characteristics from each species |
| inherited variation | Variation caused by genes |
| interbreed | Reproduce with other members of the same group |
| invertebrate | Animal with no backbone |
| key | Diagram containing a set of questions or statements that can be used to work out the name of an organism |
| kingdom | The largest division in the classification of organisms |
| Kingdom Animalia | A large group of complex organisms that have nervous systems |
| Kingdom Fungi | A large group of organisms that cannot make their own food. They reproduce using spores (rather than seeds) and live attached to their food source. They include moulds, yeasts, mushrooms and toadstools |
| Kingdom Plantae | A large group of organisms that usually have cells containing chloroplasts and can make their own food using photosynthesis |
| Kingdom Prokaryotae | A large group of organisms that consist of one cell, which does not have a nucleus. Bacteria are an example |
| Kingdom Protoctista | A large group of organisms that do not fit into any of the other four kingdoms. Algae are an example |
| Mammals | Vertebrates that have fur, lungs and produce milk on which they feed their young |
| (H) MRSA | Methicillin-resistant Staphylococcus aureus, a strain of bacterium that is resistant to many kinds of antibiotics |
| Mutation | A change in the DNA of a gene |
| natural selection | process in which the organisms that are best suited to the conditions in their habitats are more likely to survive |
| oviparous | Offspring develop in eggs, as in birds |
| poikilotherm | An animal whose body temperature varies with the temperature of the environment around it |
| protozoan | Type of one-celled protoctist that requires a source of food (i.e. it cannot photosynthesise as some other protoctists can) |
| Prototista | Unicellular organism with a nucleus |
| Prokaryote | Unicellular organism with no nucleus |
| Reptiles | Vertebrates that have lungs, dry and scaly skin and lay leathery-shelled eggs |
| ring species | A ring of populations, in which neighbouring populations that can interbreed but the populations at the two ends of the chain cannot (despite the fact that they might both live in the same area) |
| saprophytic feeding | Getting food by digesting the tissues of other organisms outside the body and absorbing the digested food |
| speciation | Formation of new species, such as when populations of a species are separated geographically and evolve until they are no longer capable of interbreeding |
| species | Each different type of organism is called a species. The members of a species can reproduce with each other to produce offspring that will also be able to reproduce |
| spinal cord | Large bundles of nerves, leading from the brain and down the back |
| thermoregulation | The control of temperature inside the body by mechanisms in the body |
| vertebrate | Animal with a backbone |
| virus | A particle that can enter and then infect cells and cause the cells to make copies of that virus, such as the influenza virus |
| viviparous | Mother gives birth to live young, as in mammals |
| Viruses are not classified into any of the five kingdoms. Suggest reasons for this. | viruses are non-living (1) viruses are not made up of cells (1) viruses do not possess any cell organelles (1) viruses rely upon a host to exist (1) |
| What is the name of the interbreeding of two DIFFERENT species | hybridisation |
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ursulinebio
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