The diagram illustrates bees visiting a flowering plant species with tall spikes of flowers. In the flowers at the base of the spike, the carpels are mature whereas the anthers are still immature. In the flowers at the top of the spike, the anthers are mature whereas the carpels are still immature. Which statements are correct?
- A1, 2 and 3
- B1 and 2 only
- C1 and 3 only
- D2 and 3 only