Coal is made almost entirely of which chemical element? Group of answer choices.

A. mercury

B. carbon

C. uranium

D. sulfur

What was carolus linnaeus' classification system of organisms based on? a.physical characteristics of organisms b.food habits of organisms c.habitat of organisms d.size of organisms

Glycogen is an energy-storage molecule in humans. a hormone that is called insulin controls the storage of glycogen in the liver. insulin is made up of amino acids.

What is any method of measuring the age of an object or event in years, such as using atomic half-life?