Help what is the element that was like named after the elemenT HELP PLEASE

Idont understand by supporting the plant and holding the leaves up to the light. question 3 options: tap or fibrous root flower petals herbaceous or wood stems leaves with stomata

Explain how paleontologists use trilobite fossils as index fossils for various geologic time periods.

Use the distance formula to determine weather each pair of segments have the same length