Record your observations of how the agar cubes look before you add vinegar and then after you add vinegar and stir. how did the appearance of the cubes change over time?

Both the size and color of vinegar cubes changed.

Explanation:

The agar cubes before the addition of vinegar looked pink in color due to the addition of coloring agent for testing color change on addition of vinegar.

When vinegar is added the color  of agar changes from pink to orange as vinegar is acidic in nature.

Also as the vinegar diffused into the cubes it became large after stirring. Thus, both the size and color of vinegar cubes changed.

1. amino acid refers to the fundamental building block of proteins, comprising of an amino group and a carboxyl group.

2. catalyst refers to any substance, which increases the rate of chemical reaction without being used up in the reaction.

3. a complex molecule containing he genetic code is dna or deoxyribonucleic acid.

4. an enzyme refers to a molecule of protein, which is unique in accelerating up a particular chemical reaction in the biological systems.

5. nucleic acid refers to an sequence of sugars, phosphates, and nitrogenous bases, for example, dna and rna.

6. a protein refers to a large, composite organic molecule comprising of a huge number of amino acids associated together with the of peptide bonds.

7. rna refers to a nucleic acid that takes part in the production of proteins.

8. substrate refers to a compound, which takes part in a chemical reaction, and is chemically modified by the reaction.