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Figure 14 shows the limbs of some animals - Edexcel - GCSE Biology - Question 7 - 2021 - Paper 1
Question 7
Figure 14 shows the limbs of some animals. Describe how these limbs provide evidence for evolution.
Worked Solution & Example Answer:Figure 14 shows the limbs of some animals - Edexcel - GCSE Biology - Question 7 - 2021 - Paper 1
Step 1
They have a similar arrangement of bones / five digits / pentadactyl limb
Answer
The limbs of these diverse animals exhibit a similar arrangement of bones, indicating a common anatomical structure. This similarity in bone structure suggests that these species share a common ancestor from which they have evolved.
Step 2
Evolved from a common ancestor
Answer
The presence of homologous structures in the limbs of these different animals supports the theory of evolution, revealing that they diverged from a common ancestor. This evolutionary relationship is evidenced by the structural similarities despite differences in function.