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What does variation mean
variation means differences between organisms
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What is a characteristic feature
Any difference between individuals of the same species
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Name a characteristic which is impossible to spot from looking on the outside
blood group
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What does inherited mean
An animal usually displays traits inherited from its parents.
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What is an environmental characteristic feature
caused by your conditions and surroundings
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Give 4 characteristics which are completely unaffected by the environment
1)normal hair colour 2)Eye colour 3)Inherited disease 4)blood disease
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Give 4 characteristics which are influenced by genes and by the environment
weight, skin colour, academic ability, athletic powers
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Which are more affected by their environmental surroundings- plants or animals?
plants
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LIst 4 things which could affect how well a plant grows
1)temperature 2)sunlight 3)moisture 4)soil conditions
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What controls inherited characteristics
genes
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What is a gene
A set of complex chemical instructions
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Where do you find chromosomes
in the nucleus of all our cells
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How many chromosomes do humans have in each cell
Human cells have 46 chromosomes (23 pairs)
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Why are a persons characteristics a mixture of the characteristics of their parents
Genes work in pairs, one being inherited from each parent
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How many chromosomes do sperm and egg cells have each
23 each
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What happens to a sperm and ovum in fertilisation
A fertilised egg has 23 matched pairs and so develops into an embryo with a mixture of the parents characteristics
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how can selective breeding lead to new varieties of plant or animal
it produces better animals and plants, by taking the best plants or animals from the existing stock.
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give 3 examples of the results of selective breeding
1)disease or frost resistant crops can be developed 2)pedigree dogs are bred for fashion or to exaggerate certain behaviour 3)domestic livestock are selectively to produce more milk or better, tastier beef.
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What is the difference between a vertebrate animal and an invertebrate animal?
vertebrates= animals that have a backbone invertebrates= animals that don't have a backbone
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Are fungi animals or plants or neither
neither
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Give an example of a mollusc
snail
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What do keys help you do
keys are used to identify creatures
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2 rules for using keys
1)Take one creature at a time and go throughout he questions for that creature only 2)Follow the instructions on each question for whichever answer is true
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Other cards in this set

Card 2

Front

What is a characteristic feature

Back

Any difference between individuals of the same species

Card 3

Front

Name a characteristic which is impossible to spot from looking on the outside

Back

Preview of the front of card 3

Card 4

Front

What does inherited mean

Back

Preview of the front of card 4

Card 5

Front

What is an environmental characteristic feature

Back

Preview of the front of card 5
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