Suggest how this fossil was formed.
[2 marks]
Figure 1
Give three reasons why animals may become extinct.
[3 marks]
Scientists can not be sure because the fossil record that would show the transition between Archaeopteryx and modern birds is incomplete.
Suggest two reasons why there are gaps in the fossil record.
[2 marks]
Suggest how modern day birds evolved by natural selection to not have a long tail.
[4 marks]
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