Answer:
The Leydig cells produce testosterone, which also is responsible for the secondary sexual characteristics of males. In females, FSH and LH cause estrogen and progesterone to be produced. They regulate the female reproductive system which is divided into the ovarian cycle and the menstrual cycle.
Explanation:
Answer should be A system
Photosynthesis takes in carbon dioxide & lets out oxygen & glucose
Answer:
Science has excelled in altering natural things by controlling the nature since a long back. I have asked whether it can be altered in coming future or not. If it is altered obviously it will not be natural.