1 Sulfur Crystals: History and its Uses Sulfur is a chemical element that is widely abundant in nature. 2  It is classified as a multivalent non-metal. 3  Sulfur's symbol is S and its atomic number 16.
Question and answer. The __________ and __________ are the glands that stimulate reproductive cycles. A. testes. . . thyroid B. testes. . . ovaries C. ovaries. . . thyroid D. ovaries. . . thymus. The testes and ovaries are the glands that stimulate reproductive cycles. Expert answered| emdjay23 |Points 2484|.
1 Luteinising hormone and follicle stimulating hormone, also known as gonadotrophins. 2  They act on the ovaries or testes to stimulate sex hormone production, and egg and sperm maturity. 3  Prolactin, which stimulates milk production. 4  Thyroid stimulating hormone, which stimulates the thyroid gland to secrete thyroid hormones.