What is the standard unit volume? and what can be used to measure mass

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.

The negative change found inside the plasma membrane is created by potassium ions sodium ions hydrogen ions chlorine ions

Ecology can best be described as the study of what