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The Darwin orchid, Angraecum sesquipedale, is a flower found in Madagascar - Edexcel - GCSE Biology - Question 1 - 2017 - Paper 1
Question 1
The Darwin orchid, Angraecum sesquipedale, is a flower found in Madagascar. It is pollinated by a species of hawk moth. Hawk moths feed from orchids using a long tu... show full transcript
Worked Solution & Example Answer:The Darwin orchid, Angraecum sesquipedale, is a flower found in Madagascar - Edexcel - GCSE Biology - Question 1 - 2017 - Paper 1
Step 1
Explain which species of hawk moth is likely to feed on the nectar.
Answer
Species 2 is likely to feed on the nectar because its proboscis measures 25 mm, which is the same length as the tube of the Darwin orchid. This allows the moth to reach the nectar effectively. In contrast, Species 1 has a shorter proboscis of 15 mm, which would be insufficient to access the nectar, as it cannot reach the bottom of the orchid's tube.