Quiz 7 Flashcards
1
Q
3 most advanced invertebrates in the phyla:
A
- Arthropoda
- Echinodermata
- Chordata
2
Q
All 3 phylums are: (3)
A
- triploblastic (3 germ (tissue) layers)
- coelomate (true body cavity)
- exhibit the organ system level of organization
3
Q
Phylum Arthropoda (6)
A
- most diverse phylum
- 1,500,000 species
- jointed appendages
- segmentation
- tagmatization
- chitinous skeleton
4
Q
jointed appendages (in phylum Arthropoda) allows:
A
functional specialization
5
Q
Tagmatization (in Arthropods) allow:
A
fusion of segments
6
Q
Phylum Echinodermata (8)
A
- advanced group
- based on shared characteristics with the phylum Chordata
- Deuterostomes
JUST ECHINODERMS
- presence of water in vascular system
- vascular system = locomotion, feeding, & respiration
- presence of a calcareous endoskeleton
- secondarily derived pentaradial body symmetry in adult forms
- larvae are bilaterally symmetrical
7
Q
Deuterostomes (2)
A
- both Phylum Echinodermata & Chordata
- blastospore develops into the anus
8
Q
Protostomes (2)
A
- Annelids, arthropods, & mollusks
- blastospore develops into the mouth
9
Q
Blastospore
A
Embryonic development of the first opening of the digestive cavity (blastospore)
10
Q
Phylum Chordata (4)
A
- most advanced phylum
- both vertebrates & invertebrates
- 50,000 species
- all members of this phylum exhibit “4 hallmark chordate characteristics” at some point in their lifetime
11
Q
4 Hallmark Chordate Characteristics
A
- Notochord
- Dorsal Hollow Nerve Cord
- Pharyngeal Gill Slits
- Postanal Tail
12
Q
Phylum Chordata Invertebrates are placed into which 2 subphylums:
A
- Urochordata (Tunicates)
2. Cephalochordata (Lancelets)
13
Q
- Urochordata (Tunicates) (4)
A
Tunicate larvae
- free swimming
- exhibit all 4 chordate characteristics
Tunicate adult
- sessile
- pharynx + gill slits
14
Q
- Cephalochordata (Lancelets)
A
- all 4 chordate characteristics
(in both larval and adult forms)
