An expert in phylogeny is working to construct a detailed cladogram for modern perissodactyls, a group that includes horses, zebras, rhinoceroses, and tapirs. How is knowledge of paleontology (the study of ancient life) helpful to this expert for completing the cladogram

What

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hydrogen is a compound or a single element and a element is a pure substence that cannot be separated into simpler subtances

clorine is a compound its a chemical substance that forms when two or more different elements combine

so both hydrogen and clorine are compounds