The answer is B Microscope :)
Both oxygen helium and carbon dioxide are gasses. Also each of them is compressible<span>, which means that there is lots of free space between particles in oxygen helium and carbon dioxide. </span>
They are all elements that exist as gases by nadine.
Answer:
I agree with henry/snake. I will answer Maria's question by saying that it is condensation because of the temperature from outside and the temperature of the liquid if they are opposites then it will cause condensation.
Explanation:
DNA stands for Deoxyribonucleic acid. DNA consists of your chromosomes which is the genetic makeup of your physical and genetic traits.It is a double helix structure that can be analyzed with a highly powered microscope like the electron microscope <span />
Used by people is the answer. :-)