What percentage of the nucleotides in human DNA are identical?

What are the four basic classes of organic molecules how do they differ structurally and functionally

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.

Explain how the number of similarities between the embryos from early stage to late stage is used as evidence of a common ancestry