1st grow i gotta couple questions

hi nice site this is my first grow i dont know what kinda plant i have i got the seeds from a bag.. my plant looks good to me but the leaves only have 3 to 4 sides i was wondering if thats normal. and some of the lowere leaves are turning brown on the tips.any suggestions would help i will have pics up later

you are talkin' 'bout the two rounded leafs? if so it's normal for them to die