You are given a sentence and your task is to generate another sentence that supports the given input.

How the Thyroid Functions The thyroid gland operates as part of a feedback mechanism involving the hypothalamus and the pituitary gland.
The thyroid gland is controlled by a negative feedback loop that includes the hypothalamus and pituitary gland.

The day with the most hours of sunlight in the northern hemisphere (fewest hours of sunlight in the southern hemisphere) occurs when the North Pole is pointing most nearly toward the Sun, on or about June 22 of each year.
The number of daylight hours each day would be greatest during the summer near the north pole.

Microevolution is concerned with understanding the mechanisms responsible for imparting evolutionary change within populations over relatively short time periods.

Evolution that occurs over a short period of time is known as microevolution.

