A human arm, a bat wing and a whale flipper are all pentadactyl limbs.
State what is meant by a pentadactyl limb.
The finger bones in a bat wing are very long. A thin layer of skin is stretched between them.
Explain how this helps the bat to fly.
The bones in a whale flipper are short and are enclosed in a flat, paddle shape.
Suggest how this helps the whale.
Explain how pentadactyl limbs provide evidence for evolution.
40 exam-style questions on Edexcel GCSE Biology 4.2 Evidence for evolution and classification, covering 4.2.1 Fossil evidence for human evolution, 4.2.2 Stone tool evidence for human evolution, 4.2.3 Pentadactyl limb as evidence, and 4.2.4 Three domains classification. Each one has a worked solution and a mark scheme showing where the marks go.