Plants contain chlorophyll, are autotrophs, are multicellular, have rigid cell walls which support the cell
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Describe how animals are classified
Animals are heterothophs, are multicellular, with no cell wall
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Describe how fungi is classified
Fungi are saprophytes, are multicellular, have a cell wall
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Describe how protoctists are classified
Protoctists are unicellular and have a nucleus
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Describe how prokaryotes are classified
Prokaryotes are unicellular but have no nucleus
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Why is is sometimes hard to classify organisms?
Sometimes organisms do not fit into one kingdom, not all organisms interbreed, hybrids (offspring of 2 different species), variation within species, ring species
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What is a ring species?
A group of related populations that live in neighbouring areas, populations living next to each other can interbreed but populations that live further cannot
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List the 7 subdivisions of a kingdom
Kingdom, Phylum, Class, Order, Family, Genus, Species
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Whta to organisms from the phylum Chordata have?
A supporting rod-like structure that goes up the back of the body - a backbone
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What do vertebrates have?
Vertebrates have a backbone and an internal skeleton, invertebrates do not
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Name the 5 classes
Fish, Amphibians, Reptiles, Birds, Mammals
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How are vertebrates divided into the 5 classes?
How they absorb oxygen, how they reproduce, how they regulate their internal body temperature
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List the 3 ways of absorbing oxygen
Through lungs (e.g. birds), gills (e.g. fish), skin (e.g. amphibians)
An organism which gives birth to live young and feeds milk to the offspring
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List the 2 ways of regulating internal body temperature
Homeotherm and poikilotherm
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What is a homeotherm?
A 'warm-blooded' organism - its body temperature is kept constant by homeostasis (e.g. mammals)
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What is a poikilotherm?
A 'cold-blooded' organism - body temperature changes with external temperature (e.g. reptiles)
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What is the binomial system?
The binomial system gives each species a 2-part Latin name - the first part refers to the genus and the second part refers to the species (e.g. Homo sapiens)
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In what ways is the binomial system helpful?
The binomial system helps to: identify species, study species, conserve species and targer conservation efforts
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What is a key (in terms of classification)?
A key is a series of questions that you can use to figure out what an unknown organism is - as you answer more questions, the options are narrowed down
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Other cards in this set
Card 2
Front
Describe how plants are classified
Back
Plants contain chlorophyll, are autotrophs, are multicellular, have rigid cell walls which support the cell
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