It will pinch nerves aka the spinal cord so the result is to be paralyzed usually although sometimes its only temporary
Adenohypophysis is also called as the anterior lobe or anterior pituitary gland. Because of its position in the front lobe of the pituitary gland, it is named as this. It helps the pituitary gland in the major productions of growth hormone, gonadotropic hormone, thyroid-stimulating hormone, prolactin, etc.
Answer - Speciation
Reasoning - Pretty much what has happen was the two species has evolved over the course of evolution if you want to put it that way why the are incapable of breeding.
D) The Earth has changed over geologic time. Hope it helps!