Which of the following is not a correct statement about umbilical cord?
It connects the placenta to the embryo
It helps in the transport of substances to and from the embryo
It produces several hormones like hPL, estrogen and progesterone
It has $100\;\%$ foetal blood
Supporting cells found in between the germinal epithelium of testes are called
$GnRH$ stimulates two hormones from anterior lobe of pituitary
The fifth cleavage of the fertilized egg of frog results in the formation of
In vertebrates the central nervous system devlops under the influence of
When both $LH$ and $FSH$ attain peak level in the menstrual cycle ?