Choose the correct statements about proteins and evolution. 1. Lupine leghemoglobin and human ?-hemoglobin are only about 16% identical. This is an example of convergent evolution.

2. The tertiary structure of a protein is less conserved than the primary structure.

3. Percent identity for a random alignment of two nucleic acids is likely to be higher than the percent identity for an equal-length random alignment of two polypeptide segments.

4. Paralogs are derived from a common ancestor, but often have different functions.

5. Two proteins that have similar tertiary structure are said to be homologous.