How to know about the root type of a plant by simply looking at its leaf venation

 Plants reproduce sexually through flowers. I know that pedicle- style, thalamus- ovary but I am not sure with these two but I know that androecium- stamen, gynoecium- pistil but I don't know that what are calyx and coolla. Can anybody tell me the answer and make me sure with all of these, please.

Roots may not always perform the function of anchorage and absorption . Give examples to Justify.

what is venation??????

in what ways are the roots of gram and maize similar and different