OBJECTIVE OF THE ECHINODERMS

OBJECTIVE OF THE ECHINODERMS

Multip e Choice Questions MCQs

1.The origin of ossicle is:

(a) Ectoderm           (b) Mesoderm             (c) Endoderm                  (d) None

2. Hamel system is derived from:

(a)Ectoderm             (b) Mesoderm           (c) Endoderm                  (d) Coelom

3. Echinoderms are:

(a)Deutrostome       (b) Protostome            (c) Schizocoelous                (d) None

4. Echinoderms are:

(a) Enterocoelous      (b) Protostome         (c) Schizocoelous              (d) None

5. The sieve like plate is:

(a) Stone canal      (b) Madreporite      (c) Pollan vesicles       (d) Tiedemann body

6.The ring canal usually opens outside through:

(a)Stone canal    (b) Madreporite     (c) Polian vesicles       (d) Tiedemann body

7. Sites of production of phagocytes are:

(a) Tiedemann body  (b) Madreporite   (c) Polian vesicles   (d) Stone canal

8. Canals present in the arm are:

(a) Stone canal       (b) Radial canal      (c) Lateral canal     (d) Tiedemann body

9. The canal end in tube feet are:

(a) Stone canal       (b) Radial canal      (c) Polian vesicles        (d) Lateral canal

10. Brittle star belongs to:

(a) Echinoidea         (b) Asteroidea            (c) Ophiuroidea          (d) Crinoidea

11. Sea star belongs to:

(a) Echinoidea        (b) Asteroidea         (c) Ophiuroidea             (d) Crinoidea

13. Globular disc shaped echinoderms are:

(a) Echinoidea             (b) Ophiuroidea      (c)Crinoidea          (d) Asteroidea

14. The echinoderms without rays are:

(a) Echinoidea        (b) Asteroidea        (c) Holothuroidea      (d) Crinoidea

15. The number of species of Asteroidea are:

(a) 500                     (b) 1500                     (c) 1000                  (d) 2000

16. Class Ophiuroidea includes:

(a) Sea star                  (b) Brittle star             (c) Sea cucumber (d) sea anemone

17. The larva present in the Ophiuroidea is:

(a) Hpinnaria      ( b) Brichiolaria      (c) plueus larva       (d) ophiopluteus

18. Aristotle’s lantern is present in:

(a) Sea star           (b)Brittle star          (c)Sea cucumber       (d) sea urchin

19. Number of plates in the test of sea urchin are:

(a) 5                            (b) 10                        (c) 15                      (d) 21)

20. Larva present in the Echinoidea

(a) Bipinnaria         (b) Brachiolaria         (c) pluteus larva    (d) ophiopluteus

21. The number of species of Holothuroidea are:


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(a) 500                         (b) 1500                     (c) 1000                  (d)2000

Ans

1. (h) 2. (d) 3. (a) 4. (a) 5. (b) 6. (a) 7. (a) S. (b) 9. (d) 10. (c) 11. (b) 12. (a) 13. (e) 14. (1) 15. (I)) 16. (d) 17. (d) 18. (h) 19. (c) 20. (h)

Fill in the blanks

1. The 400-million years-old Paleozoic rocks have almost all the fossils of the animal, up to…………………………

2. Modern echinoderms __________ symmetry.

3. The skeleton of echinoderms consists of calcium carbonate plates called _______

4. The tube feet end in a bulblike muscular.

5. The pyloric stomach gives rise to a duct. This duct connects to the pyloric……………………….

6. The dermal branchiae and pedicellariae are absent in ………………………

7. ……………..help in the distribution of nutrients and the removal of wastes.

8. Mouth has a chewing apparatus, called Aristotle’s……………………………

Ans

1. Echinoderms              2. pentaradial                 3. ossicle          4. ampulla

5. cecea              6. ophiuroids             7. Coelomocytes            8. lantern

True/False

1. The 400-million ncar-old Paleozoic rocks have almost all the fossils of the animals up to arthropods.

2. The skeleton of echinoderms consists of calcium carbonate plates called ossicle.

3. The tube feet end in a bulblike muscular bulb.

4. The pyloric stomach gives rise to a duct. This duct connects to the pyloric CCeile.

5. Coelomocytes help in the distribution of nutrients and the removal of wastes.

6.Mouth has a chewing apparatus. called Aristotle’s lantern.

7. Some sea cucumbers can bring out Cuverian tubules through the anus.

Ans:

1. F: echinoderms         2. T                   3. F: ampulla                 4. T                   5. T

6. T                            7. T

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