Match each eon or era with the appropriate characteristic or event. 1. hadean eon largest mass extinction in earth's history 2. archean eon time of the dinosaurs 3. proterozoic eon sometimes called "age of mammals" 4. phanerozoic eon toxic atmosphere; first bacteria 5. paleozoic era current eon in earth's history 6. mesozoic era formation of the solar system 7. cenozoic era buildup of oxygen; first eukaryotes

Kelly ran electricity though a sample of water using electrolysis. the water changed into two gases, x and y. it was not possible to break down the gases x and y into simpler particles.

Select the correct answer. which mutation is harmful to the organism? a. a mutation allowing moths to camouflage better on blackened tree bark b. a mutation making staphylococcus aureus resistant to the antibiotic methicillin c. a mutation inhibiting human immunodeficiency virus from attaching to and entering the cell d. a mutation causing uncontrolled cell division e. a mutation giving plant leaves a bitter taste to discourage herbivores from eating them

Study this image which statement best describes the rock shown check all that apply