The estrus cycle is a characteristic of:
Human males only
Human females only
Mammalian males other than primates
Mammalian females other than primates
Human eggs are:
Alecithal
Microlecithal
Mesolecithal
Macrolecithal
Eye lens is formed from:
Ectoderm
Mesoderm
Endoderm
Both (a) and (b)
Ovulation occurs under the influence of:
LH
FSH
Estrogen
Progesterone
How many sperms are formed from a secondary spermatocyte?
4
8
2
1
Acrosome reaction in sperm is triggered by:
Capacitation
Release of lysin
Influx of Na+
Release of fertilizin
Termination of gastrulation is indicated by:
Obliteration of blastocoel
Obliteration of archenteron
Closure of blastopore
Closure of neural tube
In telolecithal egg, the yolk is found:
All over the egg
On one side
Both the sides
At centre
Middle piece of mammalian sperm possesses:
Mitochondria and centriole
Mitochondria only
Centriole only
Nucleus and mitochondria
Meroblastic cleavage is division:
Horizontal
Partial / parietal
Total
Spiral