<prompt> Development of spermatozoa sperm from spermatogonium takes how much time-3 0-3 5 days40-45 days50-55 day70-75 days  <response>: Ans. is d i.e., 70-75 days o Spermatogenesis refers to the process of formation of spermatozoa sperm from primitive germ cells spermatogonia.o Spermatogenesis begins at puberty and continues throughout adult life to decline in old age.o In humans, it takes an average of 74 days to form a mature sperm from primitive germ cells.o Spermatogenesis occurs in seminiferous tubules. 