What does the diagram represent here? I am having trouble understanding
Answer:
i think its vestigial, but if not then it is homologous.
hope that hepls!
seed coat protects the cotyledons and embryo from outer environment and from attack of pathogens
pollen grain has a sculptors covering with weak points(germ pores) in it through which pollen tube comes out.
A spore is generally protected by 2-3 tough resistant walls around to tied over the unfavourable conditions.
