Theory because a theory has to be backed up by several experiments
Answer:
Water sample showing pink/purple color is an error.
Explanation:
Biuret is a blue color reagent that changes its color to pink/purple whenever it detects protein in a sample. Water don't contain proteins so it should not show pink/purple color instead it should maintain the blue color. Food items generally contain proteins so it show pink/purple color but it showed blue color.
Error might have caused by wrong marking of the samples, test tube marked with Water might contain a mystery food while Mystery food tube might contain water.
Answer:
The mash grass was 0.62 m tall. (Quantitative)
The experimental group was yellow with green spots (Qualitative)
Explanation:
Quantitative= data values are given
