1. Poison Ivy growing on a tree by touch. A. Gravitropism
B. Phototropism
C. Thigmotropism
D. Hydrotropism

Calculate the energy required to ionize a hydrogen atom to an excited state where the electron is initially in the n = 5 energy level. report your answer in kilojoules

What causes most sediment to wash or fall into a river

Consider the story you just read. all but one of the choices below indicate that something is living.