What is a single stranded nucleic acid?

DNA

RNA

How does deforestation affect the water cycle? a. it increases the amount of runoff b.it increases the amount of percolation c. it increases the amount of transpiration d. it increases the amount of precipitationa it increases the amount of runoff

All eukaryotic cells contain small bodies called

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