Biology Vocab

3. Eukaryotic organisms that can be unicellular, colonial, or multicellular.
5. clock Model used to compare DNA sequences from two different species to estimate how long they have been evolving.
8. Contains related orders.
9. Branching diagram that represents the proposed phylogeny or evolutionary history of a species or group.
10. Phylum, contains related classes.
11. Division, contains related classes.
12. Method that classifies organisms according to the order they diverged from a common ancestor.
13. A discipline of biology concerned with identifying,naming, and classifying species based on natural relationships.
16. Taxen composed of related phyla or divisions.
17. Named group of organisms.

1. A group of species that are closely related and share a common ancestor.
2. nomenclature Gives each species a specific name with two parts.
3. Evolutionary history of a species.
4. Thought to be more ancient than bacteria, yet more closely related to eukaryotic ancestors.
6. Grouping objects or organisms based on a set of criteria.
7. A similar, related genera.
10. Broadest of all taxas, contains one or more kingdoms.
12. Inherited features that vary among species.
14. Contains related families.
15. Unicellular or multicellular eukaryote that absorbs nutrients from organic material in its environment.