Who first introduced the idea that the sun is the center of the universe?

There are six elements that make up most of the human body. which of the following is not one of these six elements?

Which statement describes an endocrine function rather than an exocrine function? a. salivary glands release saliva into the mouth. b. sweat glands release sweat onto the skin c. the pineal gland releases melatonin into the blood. d. esophageal glands release mucus into the esophagus.

What is the statement plant growth is affected by the color light