How does the cells in unicellular organisms compare with cells in multicellular organisms

What happens during the heat transfer within earth

Explain why in any given geographical region, women tend to have lighter skins( by 3-4% on average) than men?

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