The protective coat which surrounds the embryo is known as………
a) amnion
b) chorion
c) allantois
d) chorio allantoic
Explanation: The amnion is the outer membrane, created by bilateral folding of the extraembryonic somatopleure and fusion of the chorioamniotic folds dorsal to the embryo in domestic animals.
The outer layer of the blastocyst, which later attaches to the uterus is the……..
a) deciduas
b) trophoblast
c) amnion
d) inner cell mass
Identical twins result from the fertilization of ……….
a) one ovum by one sperm
b) one ovum by two sperm
c) two ova by two sperms
d) two ova by one sperm
The most important hormone in initiating and maintaining lactation after birth is…
a) estrogen
b) FSH
c) Prolactin
d) oxytocin
Explanation: Prolactin is a hormone made by the pituitary gland, a small gland at the base of the brain. Prolactin causes the breasts to grow and make milk during pregnancy and after birth.
