Practical #1 Exam: Systematics Flashcards
1
Q
Systematics
A
- 3 domains
- 6 kingdoms
- 28 phyla
- used to follow evolutionary trends to add understanding and memorization
2
Q
Monophyletic Group
A
- all members trace back to a recent common ancestor
3
Q
Polyphyletic Group
A
- members do not trace back to their
most recent common ancestor - more work is needed to refine evolutionary
relationships
4
Q
Homologous
A
- similarity derived from common ancestry
5
Q
Analogous
A
- artificial similarity not
based on common ancestry - the independent origin of similar trait
from a dissimilar ancestral condition.
6
Q
Ex. of Analogous
A
-same function but different evolutionary lineage.
- have different functions.
- evolutionary lineage.
- different evolutionary lineage.
7
Q
What is the goal of phylogenic trees?
A
- to have lineage trace back to common ancestor without including unrelated species
8
Q
What information should you use to determine if something is homologous or analogous?
A
- kingdom designation
- x-ray
- ratio of appendage to torso
- outer covering composition
- ribosomal sequences