In spiral cleavage turn of spiral may be
Clockwise
Anticlockwise
$(a)$ and $(b)$ both
None of these
The figure given below illustrates the changes taking place during the human menstruation cycle
Identify hormones $A, B, C, D$ and $E$ from the figures
In the boxes shown in the figure write the name of the hormone (or hormones) controlling the stage in the human menstrual cycle
Massive amount of yolk present in the vegetal region of the egg, makes an egg
Blood flowing in umbilical cord is
Notochord, skeletal system and dermis of the skin are the derivatives of
Sertoli's cell are regulated by the pituitary hormone known as