Vidyun, it was great meeting you last week! I am sure you will do great! Thanks for the biscuits!!
Back to the leaf, you see how nature has built an efficient and beautiful supply system? Every cell gets nutrients/water from those fine pipe lines!! Why do you think nature has designed it this way? Do you think nature had/has other choices too? Next time check every type of leaf against sun and think about it. I will tell one secret, we have not been able to design such wonder systems that we can find in nature. This includes all phones/computers that we play with. Spend more time in nature, carefully observe and ask more questions!!
Looking forward to see you again in field!