Question

give reason :-
1. pollen grains have a tough protective coat .​

Answer 1

Answer:

because pollen grains donot get damage

Explanation:

Answer 2

Explanation:

The outer protective layer of pollen grain is made of sporopollin which is one of the strongest organic material that is resistant to high temperature acidic conditions and alkaline nature.so to protect the pollen grain from these temperature and pH issues there is a protective layer around pollen grain to ensure and enhance the probability of landing of pollen grain on stigma

Ugh..I don't know the exact spelling of that organic material please have look at it in your text book

Hope it helps :)