What is chemosynthesis? • How do chemosynthetic organisms get energy? Some examples of organisms include colorless sulfur bacteria, iron bacteria, and giant tube worms (Riftia parchyptila).

By making reactions between elements or compounds.

Explanation:

Sulfur bacteria use sulfur as their main source of energy. We can say that they eat sulfur as you eat a burger or a fruit salad. This is the samething for iron bacteria.

the supermassive black hole is in the middle of the galaxy.

the level of progesterone is low at the pre-ovulatory phase of the cycle but it gradually increases and the levels are high at the luteal phase. if pregnancy occurs, the level of progesterone will be high throughout the pregnancy.

if egg is fertilized and the mother gets pregnant, progesterone starts preparing the uterus for the implantation. it starts building up the lining of uterus and make it hostile of the period of pregnancy.