In a laboratory, you produce a quantity of the radioactive isotope unobtainium-253. Over the course of several weeks, the unstable isotope decays, and you measure the amount of unobtainium-253 remaining in the sample. You obtain the following data: The half-life of unobtainium-253 is _Incorrect. days.

After 2 half-lives, there will be _Incorrect. grams of unobtainium-253 remaining in this sample.

After _Incorrect. days, there will be 1.5 grams of unobtainium-253 remaining in this sample.

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.

linnaeus is the father of taxonomy, which is the system of classifying and naming organisms. one of his contributions was the development of a hierarchical system of classification of nature. today, this system includes eight taxa: domain, kingdom, phylum, class, order, family, genus, and species.