Reading...
Play button
Play button
Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
6 Cards in this Set
- Front
- Back
|
Homology vs. Analogy
|
Homologous structures share a common phylogeny, analogous structures have similar functions but not the same phylogenetic origin
|
|
|
Divergence vs. Convergence
|
Divergence yields new and different forms, convergence yields similar forms often from unrelated origins
|
|
|
Taxon vs. Clade
|
Each Taxon (e.g. a Class) includes all the taxa in the next finer level (e.g. Orders). Taxonomy thus is a hierarchy, a set of levels but might not be phylogenetically accurate. Each Clade (e.g. a Class) includes all the ancestral species of the group and all their descendants. Cladistics is thus a hierarchy that is strictly based on shared derived characters and seeks phylogenetic historical accuracy.
|
|
|
Monophyletic (Clade), Paraphyletic, Polyphyletic groups
|
Monophyletic has ONE ancestral origin and includes all descendants = best Paraphyletic fails to include all descendants Polyphyletic includes some with different ancestors |
|
|
|
|
|
|
|
|
