Question 1-5 A scientist mistakenly forgot to label her cell samples. She has one human skin cell, one E. Coli cell, and one tree fern cell The scientist has collected data about each cell from a microscope.

when atoms of different types of elements join together, they make molecules called compounds. water consists of compound molecules made up of 2 hydrogen atoms and 1 oxygen atom. this is why it's called h2o. water will always have 2 times the number of hydrogen atoms as oxygen atoms.

b.

frogs. the lower the ph the higher the acid content. frogs have the highest tolerance in this scenario.