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.

The construction of phylogenetic trees is a mapping out the proposed divisions and common ancestors of all living species. traditionally, these trees have been built using morphological data, such as appearance and embryology. recently, it has been possible to construct these trees using molecular data. phylogenetic trees based on different types of information agree with each: that there is strong evidence of a real underlying common descent. this phylogenic tree is composed based on molecular data (rrna). what statements can we infer are true about the organisms throughout the tree? because the tree is rooted, all branches share a common ancestor. all organisms have some sort of cellular structure/organization. all eukaryotes evolved from bacteria. since the organisms contain rna, they share the same dna. if the organisms contain rna, the share the same four nitrogen bases.

Which muscle is responsible for inhalation ?

Which of the following shows the correct order in which light information travels through the eye? (2 points) lens, pupil, retina, optic nerve pupil, lens, retina, optic nerve pupil, lens, optic nerve, retina lens, pupil, optic nerve, retina