This diagram shows a single-celled organism. What is the main reason this organism may be classified as a prokaryote?

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.

Mineral rich water heated by newly found oceanic crust escapes through cracks in the ocean floor called

What is the difference between a scientific hypotheses and a scientific theory?