Variation and Classification
The We classify living organisms into many groups. This is called Genus, which is always capitalised. Species is the name given to organisms that share the same characteristics as other organisms. Species is never capitalized unless it is at the beginning of a sentence. Also if two organisms belong to the same species then it means that would be able to produce fertile offspring together although in some cases the same genus means that they can breed together. An example of this is is a tiger and a lion, which make a liger. The different groups of classification are
-Kingdom
-Phylum
-Chordata
-Animalia
-Felidae
-Genus
-species
A mnemonic to remember this is Kinky Pigs Can Always Fly Going sideways (notice that sideways is not capitalized because species will never be capitalized.
A way of remembering the seven characteristics of living organisms is MRS GREN, Movement, Respiration, Sensitivity, Growth, Reproduction, Excretion, Nutrition.
Variation also exists among species. Variation is the name given to characteristics that differ among species. Different types of Variation are discontinuous and continuous. Discontinuous variation is genetic + environmental, whereas continuous variation is just genetic.
Examples of continuous variation are: shoe size, hand span, tongue rolling and eye colour.
Examples of discontinuous variation are: hair colour, skin colour and a hitchhiker's thumb.
Features we have got in common are: arms and legs, 4 fingers and a thumb on each hand, prominent nose, 2 front facing eyes etc.
Features we have that differ are: skin colour, eye colour and hair colour etc.
Now onto classification of plants and animals...
Plants are split into two groups, which are monocots and dicots.
Animals are known as vertebrates or invertebrates.
The groups of vertebrates are
Birds
Reptiles
Amphibians
Fish
Mammals
The groups of invertebrates are
Echinoderm
Arthropod
Mollusc
Annelid
Cnidaria
Classification keys are ways of classifying animals, whether they are plants or animals, or any type of organism.This is an example of a classification key:
-Kingdom
-Phylum
-Chordata
-Animalia
-Felidae
-Genus
-species
A mnemonic to remember this is Kinky Pigs Can Always Fly Going sideways (notice that sideways is not capitalized because species will never be capitalized.
A way of remembering the seven characteristics of living organisms is MRS GREN, Movement, Respiration, Sensitivity, Growth, Reproduction, Excretion, Nutrition.
Variation also exists among species. Variation is the name given to characteristics that differ among species. Different types of Variation are discontinuous and continuous. Discontinuous variation is genetic + environmental, whereas continuous variation is just genetic.
Examples of continuous variation are: shoe size, hand span, tongue rolling and eye colour.
Examples of discontinuous variation are: hair colour, skin colour and a hitchhiker's thumb.
Features we have got in common are: arms and legs, 4 fingers and a thumb on each hand, prominent nose, 2 front facing eyes etc.
Features we have that differ are: skin colour, eye colour and hair colour etc.
Now onto classification of plants and animals...
Plants are split into two groups, which are monocots and dicots.
Animals are known as vertebrates or invertebrates.
The groups of vertebrates are
Birds
Reptiles
Amphibians
Fish
Mammals
The groups of invertebrates are
Echinoderm
Arthropod
Mollusc
Annelid
Cnidaria
Classification keys are ways of classifying animals, whether they are plants or animals, or any type of organism.This is an example of a classification key:
Kinky Pigs Can Only Fly Going sideways (order, not animalia)
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