This is known as the double helix.
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Explanation:
Pituitary gland: The main endocrine gland. It is a small structure in the head. It is called the master gland because it produces hormones that control other glands and many body functions including growth. The pituitary consists of the anterior and posterior pituitary.
First comes fertilization, when two gametes combine to form a zygote.
Answer:
It was established on June 18 of 1981.
