1. Name 3 groups of deuterostomes 2. Are all vertebrates deuterostomes? 3. In de
ID: 43149 • Letter: 1
Question
1. Name 3 groups of deuterostomes
2. Are all vertebrates deuterostomes?
3. In deuterostomes there is ______cleavage (spiral/radial)
4. Formation of the ______ at the blastopore (mouth/anus)
5. Do they have a coelom?
6. Do echinoderms have a head?
7. Do they have a mouth and an anus?
8. What is the function of the madreporite?
9. Do sea stars have asexual or sexual reproduction?
10. Echinoderms are ________blastic and _____stomes and ____coelomates.
11. Chordates are _____ animals(bilateral/radial symmetry) that belong to the clade of animals known as ________ (Deuterostomes/ Protostomes)
12. Can chordates be invertebrates?
13. What is the difference between a vertebrate and a Chordate?
14. What 4 traits define the Chordata group?
15. Compare and contrast Hagfish, lampreys and Chondrichthyans. Name three things they have in common and two things that distinguish them.
Explanation / Answer
1. The 3 clades are:
a. Echinoderms
b. Hemichordates
c. Chordates
2. Yes all vertebrates are deuterostomes
3. Radial
4. Anus
5. Yes, they have coelom
6. No, echinoderms do not have a head
7. Yes, echinoderms have mouth and anus
8. The main function of madreporite is that it acts as a water filter that poses as a barrier towards unwanted stuff and prevents this stuff from getting into vascular system of sea star.
9. Asexual mainly. The can also reproduce by free-spawning.
10. Holoblastic, Deutrostomes and true coelomates
11. Bilateral symmetry and belong to the clade of animals known as Deutrostomes.
12. Yes, chordates can be invertebrates
13. The main difference is that Vertebrates have backbone while chordates are boneless and limbless and use cartilage to support cartilage.
14. 4 traits that define are:
a. Notochord
B. Hollow nerve cord
C. Pharyngeal pouches
D. Endostyle
15. Following are the Similarities and differences between hagfish and lampreys:
Similarities-
a. They are jawless
b. They lack gill arches
c. They lack paired fins
Differences:
a. Hagfish have rudimentary branchial skeleton while lampreys have well developed skeleton.
b. Oral disc is absent in hagfish while oral disc is present in lampreys.
Similarities and differences with Chondrichthyes are:
a. They have jaw
b. They have paired fins and paired nares
c. Their skeleton is made of cartilage
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