Anup Kumar: Your Educational Guide

Answer

Meosis takes place during pollen germination leads to tetrad pollen grain grain.

Answer

As you go through the name Meiocyte means cell where meiosis takes place and meiosis takes place in diploid germ cell  wether in sexual reproduction in floweing plant or in human being and male or female sex cell/germ cell.

I hope this will help you to understand cocept.

Answer

Reason (1) 200-400 Million sperm produced from this amount only 60% sperm have normal shape and size and

from this only 40% have vigrous motility and contain more no of mitchondria as a energy source .

(2) Female genital tract is acidic in nature but acidic nature vary among diffrent women so acidic nature kill some sperm 

(3) Sperm have to travel against the gravity .

(4) Life of sperm within acidic environment in female genital tract is 24 hrs