Topic 15

Question 1

What is duetrosomia based off?

Answer 1

DNA Evidence

Question 2

Deuterosomia cleavage:

Answer 2

radial, indeterminate

Question 3

Phylum Echinodermata
\
Characteristics

Answer 3

1. Radial symmetry in ADULTS(pentaradial symmetry
2. Calcareous endoskeleton
3. Water Vascular system
4. Larvae- bilateral symmetry
   broadcast spawning

Question 4

Phylum Chordata

Answer 4

1 NOTOCHORD
2 DORSAL, HOLLOW NERVE CHORD
3 PHARYNGEAL SLITS
4 MUSCULAR POST ANAL TAIL
bilateral symmetry
segmentation

Question 5

CephaloCHORDATA

Answer 5

Lancelate
segmentation
sedimentary suspension feeders
adult has all features

Question 6

Urochordata

Answer 6

Larvae has all features
sessile sus feeder

Question 7

Craniata/ vertebrata
what are they?

Answer 7

-chordates w head
- more coordinated movement and complex movement and feeding behaviour

Question 8

Vertebrate derived character states
(know 3)

Answer 8

1.2 or more clusters of Hox genes
2.Neural Crest
3. endoskeleton
4. modified circulatory system- 2 chambers, hemoglobin
5. Pronounced Cephalization- skull+cranium
6. vertebral column
7 pharyngeal cleft-gill slits or part of ear

3 I want
endoskeleton, modified circ system, pharygeal cleft

Question 9

Cyclostomata

Answer 9

jawless vertebrates
lack teeth
long, flexible, no paired fins

Question 10

Class Myinxi(cyclostomata)

Answer 10

primitive vertebrate
Cartilagenous cranium and other skeletal elements

Question 11

Class Petromyzontida(cyclostomata)

Answer 11

lampreys
Notochord surrounded by cartilagenous tube
primitive vertebral column
resemble lancelelets