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The Origin Of Living Things ch9 - Coggle Diagram
The Origin Of Living Things
ch9
Biodiversity means different types of living things
We get our evidence of past species from fossils
‘The Theory Of Evolution By Natural Selection’ put forward by Charles Darwin
Observation
Living things produce large numbers of offspring
The environment can only support a limited number of living things
Members of all species have (at least slight) genetic variation
Hypothesis
A. Living things experience a ‘struggle for existence’
B. Nature selects organisms with variations that help them survive in their environment
Timeline Of Biodiversity
4.6 Billion Years Ago Earth was formed
3.8 Billion Years Ago life appeared on earth
A single cell bacteria that lived in the sea
For 4 billion years all life was in the water
3 Billion Years Ago first fungi grew on land
220 Million Years Ago the dinosaurs roamed
140 Million Years Ago the first birds appeared
200,000 Thousand Years Ago humans appeared