Which of the following statements about cell differention is true

In dna, only the_ varies from one nucleotide to another. base phosphate sugar amino acid

What is an endocrine function? (apex) a.esophageal glands release mucus into the esophagus b.salivary glands release saliva into mouth c.swear glands release sweat to the skin d.the pineal gland releases melatonin into the bloodstream

Long-period comets come from the oort cloud particles in earth’s atmosphere material from the asteroid belt the kuiper belt