How many of the characters given below are true for echinoderms?

I. An endoskeleton of calcareous ossicles
II. The adult echinoderms are radially symmetrical but larvae are bilaterally symmetrical.
III. They are triploblastic and coelomate animals.
IV. Digestive system is complete.
V. Water vascular system
VI. Sexual reproduction, internal fertilization, and direct development.


1. 3
2. 4
3. 5
4. 6

Subtopic:  Phylum Echinodermata |
 60%
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Match each item in Column I with one item in Column II and chose your answer from the codes given below:

Column I

Feature

Column II

Phylum

(a) Lateral line system

(b) Water vascular system

(c) Radula

(d) Comb plates

(e) Parapodia

(i) Ctenophora

(ii) Mollusca

(iii) Echinodermata

(iv) Osteichthyes

(v) Annelida

Codes

             (a)  (b)  (c)  (d)  (e) 

1.          (i)  (ii)  (iii)  (iv)  (v) 

2.          (iv)  (iii)  (ii)  (i)  (v)   

3.          (iv)  (iii)  (i)  (v)  (ii)

4.          (iii)  (ii)  (i)  (v)  (iv) 

Subtopic:  Phylum Ctenophora & Platyhelminthes | Phylum Annelida | Phylum Mollusca | Phylum Echinodermata | Comparative study of Cartilagenous & Bony Fishes |
 91%
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Which of the following is not an Echinoderm character?

1. Exclusively marine

2. Radial symmetry in adults

3. Protostome embryonic development

4. Water vascular system

Subtopic:  Phylum Echinodermata |
 81%
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Echinoderms are not characterized by:

1. An absence of excretory system

2. Bisexual animals

3. Usually external fertilization

4. Indirect development with free swimming larva

Subtopic:  Phylum Echinodermata |
 60%
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Which of these is not a coelenterate?

(1) Sea pen

(2) Sea fur

(3) Sea anemone

(4) Sea lily

Subtopic:  Phylum Echinodermata |
 71%
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Closed circulatory system is not found in

(1) octopus

(2) tunicates

(3) echinoderms

(4) squids

Subtopic:  Phylum Echinodermata |
 54%
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Which of the following is not an annelid?

1. Leech

2. Earhtworm

3. Sea mouse

4. Sea cucumber

Subtopic:  Phylum Echinodermata |
 81%
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In which of the following animals the adults have pentamerous radial symmetry while their larvae are bilaterally symmetrical?

(1) Arthropods

(2) Molluscs

(3) Echinoderms

(4) Annelids

Subtopic:  Phylum Echinodermata |
 93%
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Ambulacral grooves are absent in the living forms of the Class

(1) Crinoidea

(2) Asteroidea

(3) Ophiuroidea

(4) Echinodermata

Subtopic:  Phylum Echinodermata |
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Retrogressive metamorphosis occurs in

(1) Hemichordata

(2) Cephalochordata

(3) Urochordata

(4) Vertebrata

Subtopic:  Phylum Echinodermata |
 63%
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