How do scientists know about the liquid outer core? how do scientists know that the outer core is liquid? need major

Why do you think water is so important to living things

*will mark brainliest to first correct answer* photosynthesis led to increasing levels during the later proterozoic eon? a. oxygen b. water c. carbon dioxide d. none of the above

Identify any four organelles that should be present in the eukaryotic organism and describe the function of each organelle