Nervous system in vertebrates develops from
Endoderm
Ectoderm
Mesoderm
Endoderm and mesoderm both
The female rabbit is
A boy who has not passed through puberty sustains an injury to his anterior pituitary such that $FSH$ is no longer released, but $LH$ secretion is normal. After he grows to maturity, one would expect that he would
Neural crest cells break off from the ________ and later move to the sides of the developing embryo to form ________
The following graph of relative concentrations of the four hormones present in the blood plasma of a woman during her menstrual cycle. Identify the hormones $A, B, C$ and $D$
Fructose is present in the secretion of