Sheila conducts an investigation to see how the amount of salt dissolved in water affects the density of the water. which
statement best describes the correct plan for her procedure?
o the density and the amount of water are controls, and the amount of salt and the type of salt are variables
o the amount of water and the amount of salt are controls, and the type of salt and the density are variables.
o the type of salt and the amount of water are controls, and the amount of salt and the density are variables
the type of salt and the density of water are controls, and the amount of salt and the amount of water are variables

idk im sorry.

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.