Radioactive isotopes are routinely used to investigate processes in living things. In 1941, biologists exposed photosynthesizing cells to water containing a heavy oxygen isotope, designated 18-O. The labelled isotope appears in the oxygen gas released in photosynthesis, demonstrating that the oxygen came from water. Explain where the 18-O would have ended up if the researchers had used 18-O-labelled carbon dioxide.

pdates rades mbers Stanley Miller and Harold Urey created an experiment that simulated conditions on early Earth. Building on the results from this experiment, scientists decide to test the effect of varying the initial amount of NH3 on monomer formation. They set up the same simulation with the exception of starting with three different concentrations of NH3. The amounts of H2 and CH4 are kept constant in each treatment. They run five simulations per NH3 concentration, as well as five simulations that only have H2 and CH4. What is the independent variable? * aferences Online sela en Periods 1 and 2 iods MP1, Highschool hool MP3, MP4 Temperature Sparks Monomer formation Thu Fri Amount of NH3 A population that is in Hardy-Weinberg equilibrium does not experience any migration. How does this relate to evolution? *

Now imagine if you removed one hydrogen from methane and added a second carbon and its associated hydrogens. This would create ethane. Draw your completed ethane molecule below (ball and stick model).

Please step by step answer and don't use ASI Answer please