Which of the following is an example of qualitative observation?
joseph is observing the color difference in the reaction mixture of each of the test samples to see what types of proteins are present in them.
joseph is measuring the color of the reaction mixture colorimetrically to see the concentration of proteins in the sample.
joseph is observing the color of the reaction mixture to see whether proteins are present in the given solution.

Joseph is observing the color of the reaction mixture to see whether proteins are present in the given solution.

Explanation:

Qualitative observation records data on the basis of our senses of sight, touch, smell, taste and hearing. This kind of obervation cannot be counted or measured. It cannot be recorded in terms of numbers. It describes the qualities of the data like color, texture, shape and others.

On the basis of above description, Joseph is observing the color of the reaction mixture to see whether proteins are present in the given solution is the correct option. This is because color is a qualitative data.

answer: c. two haploid cells

explanation:

image result for how many calories of energy will 20 grams of carbohydrates provide in one gram provides 4 calories

consuming the right balance of protein, carbohydrates and fat can you maintain a healthy weight and optimize your energy levels. protein and carbohydrates both contain 4 calories per gram, while fat provides 9 calories per gram.