You can use it to craft cakes, bread and cookies, as well as breed cows, pigs, sheep, chickens and mooshrooms. Those animals will also follow you, if you hold it in your hand, so you can lead them into pens for example.
You can make bread. You can make cookies too. you need cocoa beans, which you find in a dungeon or in the jungle growing on random trees
There is a photo at the related link below. There is also an informative video on obtaining, growing, and using wheat.
The top of the wheat is brown.
Wheat!
Milk milk milk sugar egg sugar wheat wheat wheat
yes
Yes
Umm yes...
feed it wheat
Just one unit of wheat in minecraft.
Put 3 wheat in a row on a crafting table.
You hold wheat in your hand.
by giving them wheat
You hold wheat in your hand.