1. (a) List three features which are essential for cross-pollination to take place (b) State three characteristics
Explanation
(a) The stigma and anthers mature at different times (i) Male and female parts of the flower are located on different plants (ii) Male and female flowers occur separately on the same plant (b) Petals are dull with no nectar of scent. Pollen grains are numerous, light, smooth and powdery so that they can be blown by the wind.