Spermatogenesis is promoted by:
As male attain puberty. Leydig cells surrounding seminiferous tubules start to secret testosterone hormone which initiate Spermatogenesis in Seminiferous tubules.It is the process by which stem cells develop into mature spermatozoa. There are three phases:
(1) Spermatocytogenesis (Mitosis)
Identify the wrong statement from the following.
The membranous cover of the ovum at ovulation is:
The ovum is enclosed by the inner thin, transparent, non-cellular coat zona pellucida and outer thick coat corona radiata, During fertilization sperm first comes in contact with the corona radiata and zona pellucida to reach the plasma membrane of the egg(ovum).
A human female reaches menopause around the age of:
The age at which a woman starts having menstrual periods is also not related to the age of menopause onset. Most women reach menopause between the ages of 45 and 55, but menopause may occur as earlier as ages 30s or 40s, or may not occur until a woman reaches her 60s.
Which among the following has 23 chromosomes?