What purpose did plating the yeast serve in this experiment? What purpose did the water serve?

yeast plating - demonstrate the procedure for yeast streaking.

water - for promoting growth as required for anaerobic respiration process.

Explanation:

Plating of yeasts can play a major role and fulfill various purposes:

1) It helps in demonstrating that yeast can grow in petri dishes.

2) It also help in explain how the proper protocol for yeast streaking.

The lanting of yeast is used to show the procedure or protocol for yeast streaking. The importance of the water is to promoting the growth of the yeast as water is required for anaerobic respiration process.

rocks and weathering-matching