Example test questions: Systematics
Multiple choice
- (Refers to a diagram of a phylogenic tree) Which of the above groups of organisms represents a monophyletic lineage?
- (Refers to a diagram of a phylogenic tree) Which of the above groups of organisms represents a paraphyletic lineage?
- Which of the following terms describes traits that are present in two species and that were inherited from a recent common ancestor?
- In _____ groups, the species all share a recent common ancestor and some but not all the descendent species of that common ancestor are considered part of the group.
- Why do we suspect that the earliest mammals lactated?
(a. they were viviparous,
b. all present-day mammals lactate and their mammary tissue is virtually identical across species,
c. we have fossil evidence of milk,
d. the earliest mammals did not lactate)
- Which of the following terms describes traits present into two species that were inherited from a recent shared ancestor?
- Flippers have evolved independently in several orders of mammals. This is an example of
(a. Parallelism,
b. Homology,
c. Convergence,
d. An ancestral trait)
Short answer
- Some early classification schemes used modes of locomotion to differentiate groups of mammals. Why is this not a satisfactory character for constructing phylogenies? Be sure to explain how convergence contributes to the problem. Name two other types of characters that are more useful. Is convergence still a problem with the other methods?
- What are the advantages and disadvantages of using morphological data for building phylogenies?
- What are the advantages and disadvantages of using molecular data for building phylogenies?
- How has the increasing availability of powerful computers changed the field of phylogenetics generally and our understanding of the evolutionary relationships of mammals more specifically?