Modern Classification

3. _________ characteristics are found within the entire line of descent of a group of organisms.
5. Anatomical or embryological traits are examples of ____________ characters
6. __________ classifies organisms according to the order that they diverged from a common ancestor.
9. One branch of a cladogram is called a _______.
13. A cladogram is also called a _________ tree.
14. The ___________ species concept defines a species as a group of organisms that is able to interbreed and produce fertile offspring in a natural setting.
15. _________ is the evolutionary history of a species.
16. The ___________ species concept is based on the idea that species are unchanging, distinct, and natural types.
17. A _________ is a branching diagram that represents a proposed phylogeny of a species or group.

1. ________ are inherited features that vary among species.
2. Aristotle and Linnaeus thought of each species as a distinctly different group of organisms based on ___________ similarities.
4. are used to compare DNA (genes) sequences between species. The more mutations present, the more time has passed since their shared common ancestor lived.
7. The cladogram is made by sequencing the order in which ________ characters evolved with respect to the outgroup.
8. The __________ species concept defines a species as a cluster of organisms that is distinct from other clusters and shows evidence of a pattern of ancestry and descent.
10. DNA and RNA are examples of _________ characters
11. __________ characters are found only after a split from the descendent line.
12. Because both birds and dinosaurs have _________ and three toes, these 'shared morphological characters' suggest that these species are related closely and evolved from a common ancestor
18. __________ used an analogy of a tree to suggest that all species developed from one or a few species.