Answer:
Low,high
Explanation:
Thyroxine is a complex organic compound containing iodine. Thyroxine concentration in the body is kept to the required levels through a negative feedback mechanism. The production of thyroid stimulating hormone is regulated by thyroxine. An increase in thyroxine inhibits the pituitary gland which responds by secreting less thyrotropic hormone. This in turn reduces the activity of thyroid gland leading to a drop in thyroxine production. A low thyroxine level removes the inhibitory influence on the pituitary so that more thyroid stimulating hormone is produced.
Answer:Venter's contribution to science was the invention of a synthetic cell. The correct option is D. Craig Venter created a synthetic cell which is totally controlled by man-made genetic instructions.
Explanation:Just because
Conservation is needed for biodiversity. If one organism (plant or animal) goes extinct it disrupts the food chain and the ecosystem forcing plants an area to go extinct themselves or to migrate. The greater the biodiversity the the healthier the ecosystem is and vice versa.
