614 B
614 B
G11 Pre-AP Biology Species relatedness can be determined using a phylogenetic tree. Phylogenetic trees are formed using evidence.
- Anatomical Evidence:
- Studying structure and form.
- Includes size shape and other physical features.
- Physiological Evidence:
- Study of functions/processes, such as chemical and internal processes.
- Example, guinea pig's insulin is closer to humans than mice.
- DNA Evidence:
- Studying DNA sequence (bases) or amino acid sequence. DNA similarity positively correlates with relation.
In terms of evidence credibility for relatedness, DNA > physiological > anatomical.