Archenteron is lined with
Ectoderm
Mesoderm
Endoderm
Mesoderm and endoderm
Failure of descending testis into scrotum is known as
In vertebrates the central nervous system devlops under the influence of
Sperm enters from which part of egg?
The elastic tissue connecting the cauda epididymis to the scrotal sac is
The events of the menstrual cycle are represented below. In which of the following option the level of $FSH$, $LH$ an progesterone is mentioned correctly