BIO UNIT 7 FINAL STUDY 😭💔

Anatomical Differences

1. Similarities and differences among homologous structures help determine how recently species shared a common ancestor

Molecular Comparisons

1. Chemical comparisons like Amino Acid Sequences

   1. Closely related species have more similar amino acid sequences in proteins, showing shared ancestry.

   2. Weakness: can be affected by mutations

2. Comparison of small segments of DNA like a single gene

   1. Similar genes across species suggest inherited traits from a common ancestor.

   2. Weakness: only focuses on a small part of the genome, not representing overall relationships

3. Comparison of genomes.

   1. The more similar the full genomes, the more closely related the species are.

   2. Weakness: Requires advanced technology and lots of data, which isn't always available.