In angiosperms, seeds are developed inside the fruit. The seeds may have single or double cotyledons which becomes green on germination . (a) What will happen if the colour of the cotyledons is not green ? (b) How the plants are classified on the basis of number of seed leaves ? (c) Seeds of pine trees are found to be naked . What do you call such a tree? (d) Can you identify a monocotyledon or dicotyledon from their leaves ? (e) What will happen if pollination does not take place in angiosperm ?