Chordates Quiz

What are these labeled on the Amphioxus?

1) Notochord

2) Eyespots

5) Wheel organ

6) Buccal cirri

What are these labeled on the Amphioxus?

1) Myomere

2) Eyespots

3) Dorsal hollow nerve cord

4a) Gill bars

4b) Gill slits

5) Wheel organ

6) Buccal

What are these labeled on the Amphioxus?

1) Notochord

2) Eyespots

3) Dorsal hollow nerve cord

4) Gill bars

What are these labeled on the tunicate larvae?

1) Post anal tail

2) Gill slits3) Dorsal nerve cord

What are these labeled on the tunicate larvae?

1) Post anal tail

2) Pharyngeal gill slits

3) Notochord

4) Dorsal hollow nerve cord

Label the parts on this Ammocetes larvae

1) Forebrain

2) Hindbrain

3) Endostyle

4) Gill slits

5) Esophagus

6) Intestines

6) Anus

7) Post anal tail

8) Notochord

9) Dorsal hollow nerve cord

10) Gill bars

What are these parts labeled on the lamprey?

1) eye

2) Nostril

3) Pharyngeal gill slits

What are these parts labeled on the lamprey?

1) olfactory sac

2) ovary

3) dorsal hollow nerve cord

4) liver

5) heart

6) gill slits

7) nostril

8) brain

9) esophagus

10) pharynx

11) intestines

12) cloaca

What are the labeled common features on this chordate, what is its function, and what is it/ its function in mammals (us) today

A) Notochord, support structure, backbone

B) Dorsal hollow nerve cord, localized communication, spinal cord

C) Post anal tail, locomotion, coccyx/ tailbone

D) Pharyngeal gill pouches/slits, filter feeding, fustachian tube (pressure equalization)

E) Subpharyngeal gland, mucus for filter feeding, thyroid gland