What are two ways scientists can describe the quality of measurements

To describe a scientist as skeptical means that they question both existing ideas and new hypotheses. Skepticism is considered a valuably quality in a scientist because they must be able to evaluate the strengths and weaknesses of a hypothesis.

Precision and validity of the measurement  are the two ways scientists can describe the quality of measurements.

Explanation:

The quality of the measurement from time innumerable is based on quantity and magnitude. The scientists describe the quality of the measurements by comparing the existing ideas and new hypotheses.

Quality of measurements can be done by precision and validity of the measurement.  Measurements are derived by performing calculations, applications to derive accuracy and precision towards attaining the quality of measurement.  

the sugar-phosphate backbone forms the structural framework of nucleic acids, including dna and rna. this backbone is composed of alternating sugar and phosphate groups, and defines directionality of the molecule.