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Variation
Different species have different characteristics
...
For
room full of people you will see different hair colour, example in a
eye colour,
a variety of heights, etc
...
and there are two
Variation and Genes
Plants and animals have characteristics similar to their parents because
they inherit genes from
their parents
...
The
combination of genes from two parents causes genetic variation
...
Genetic variation can also be caused by changes in the organisms genes called mutations
...
Some characteristics are determined only by genes
...
g
...
Variation and the Environment
A plant grown on a nice sunny windowsill
The environment that organisms live and grow in
can also cause differences between the same species,
called environmental variation
...
The same plant grown in darkness
would grow tall-and-spindl¥
and its leaves would turn yellow
— these are environmentalvariations
...
Other environmental factors that can cause variation are
Characteristicscausedby the environment--
diet, exercise, temperature, light intensity, amount of
are called 'acquired characteristics'
...
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Genes and the Environment
...
For example, the maximum height an animal or plant can grow is determined by its genes, but
whether it grows that tall depends on its environment (e
...
how much food it gets)
...
Microorganisms —e
...
the width of bacteria varies
within a range