BIOL 3270 – Zoology
Fall 2021
Lab Assignment 1
Answer the following questions by typing directly into the document. Use textboxes to write on the pictures. Submit
the assignment through the D2L dropbox. The assignment is due Monday August 23, 2021 at 2:00PM. Late
assignments will incur a penalty as outlined in the syllabus.
Part 1. (5 pts.)
Use the following character chart to answer the following questions. A “0” represents the character not being present
and a “1” means the character is present.
Ray-finned
Lancelets Hagfishes Lampreys Sharks fishes Lungfishes
Coelacanths
Ability to breathe air
Lobed fins
Lung or swim bladder
Jaws, paired appendages
Vertebrae
Paired sense organs, tripartite brain
Dorsal nerve cord
1. Place each taxa correctly at the ends of the branches. Assume the absence of a character state is ancestral.
2. Place the correct synapomorphies at the slash marks.
Fall 2021
Lab Assignment 1
Answer the following questions by typing directly into the document. Use textboxes to write on the pictures. Submit
the assignment through the D2L dropbox. The assignment is due Monday August 23, 2021 at 2:00PM. Late
assignments will incur a penalty as outlined in the syllabus.
Part 1. (5 pts.)
Use the following character chart to answer the following questions. A “0” represents the character not being present
and a “1” means the character is present.
Ray-finned
Lancelets Hagfishes Lampreys Sharks fishes Lungfishes
Coelacanths
Ability to breathe air
Lobed fins
Lung or swim bladder
Jaws, paired appendages
Vertebrae
Paired sense organs, tripartite brain
Dorsal nerve cord
1. Place each taxa correctly at the ends of the branches. Assume the absence of a character state is ancestral.
2. Place the correct synapomorphies at the slash marks.
