Differentiate between mold spores and pollen grains.
Differentiate between an embryo and a seed
Differentiate between Bean seed and Maize grain
Question 15 Length of pollen tube depends on the distance between (a) pollen grain and upper surface of stigma (b) pollen grain on upper surface of stigma and ovule (c) pollen grain in anther and upper surface of stigma (d) upper surface of stigma and lower part of style