Explain in detail how the line emission Spectra is produced from the lavender light of hydrogen?

Which fact represents evidence for the big bang theory?

When a scientific theory has been tested and proved by the scientific community, it becomes a law

An animal cell loses the ability to convert energy stored in food to energy that the cell can use. which of the cell's organelles has stopped working? a.the mitochondria b.the nucleus c.the vacuoles d.the endoplasmic reticulum