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Q. No.The triploblastic animals differ from the diploblastic animals in having:
1.
Ectoderm
2.
Mesoderm
3.
Endoderm
4.
Gastroderm
Subtopic: Basis of Classification |
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Consider the given features:
| A: | Body cavity lined by mesoderm |
| B: | The mesoderm present as scattered pouches in between the ectoderm and the endoderm |
Select the correct option of animals having the features A and B:
| A | B | |
| 1. | Aschelminthes | Annelids |
| 2. | Platyhelminthes | Ctenophores |
| 3. | Arthropods | Molluscs |
| 4. | Arthropods | Aschelminthes |
Subtopic: Basis of Classification |
82%
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In metameric segmentation:
1. Only I is correct
2. Only II is correct
3. Both I and II are correct
4. Both I and II are incorrect
| I: | The body is divided into segments only externally. |
| II: | There is a serial repetition of at least some organs. |
2. Only II is correct
3. Both I and II are correct
4. Both I and II are incorrect
Subtopic: Basis of Classification |
68%
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The notochord:
1. Only I is correct
2. Only II is correct
3. Both I and II are correct
4. Both I and II are incorrect
| I: | is derived from embryonic mesoderm. |
| II: | is present on the ventral side during embryonic development in chordates. |
2. Only II is correct
3. Both I and II are correct
4. Both I and II are incorrect
Subtopic: Basis of Classification |
73%
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The given figure shows broad classification of Kingdom Animalia based on common fundamental features. Which of the following can be true based on the information given in the figure?
a: Sponges represent ‘A’
b: ‘B’ includes flatworms
c: Animals in ‘C’ are triploblastic
d: Radial symmetry is seen in adults of animals in ‘D’
e: Animals in ‘E’ have a complete digestive system
| 1. | only a, c and e | 2. | only a, b and e |
| 3. | only b and d | 4. | only a, c and d |
Subtopic: Basis of Classification |
76%
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Identify the incorrect statement regarding sponges:
| 1. | Water enters the sponge body through ostia into a spongocoel from where it goes out through the osculum. |
| 2. | Body is supported by a skeleton made up of spicules or spongin fibres. |
| 3. | Sexes are not separate. |
| 4. | Fertilization is external. |
Subtopic: Phylum Porifera |
83%
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Regarding the cell shown in the given figure:
| I: The name Cnidaria is derived from this cell |  |
| II: The stinging capsule present in the cell is called as nematode | |
| III: These cells help cnidarians in anchorage, defence and in capturing the prey |
1. While I and II are correct, III is incorrect
2. I, II and III are correct
3. Only II is incorrect
4. Only I is correct
Subtopic: Phylum Coelenterata |
52%
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Identify the incorrect statement regarding animals belonging to the Phylum Cnidaria:
| 1. | Gastrovascular cavity has a single opening, mouth on hypostome. |
| 2. | Corals are cnidarians and have a skeleton of calcium carbonate. |
| 3. | They exhibit tissue level of organization and are diploblastic. |
| 4. | Digestion is exclusively intracellular. |
Subtopic: Phylum Coelenterata |
83%
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Consider the following statements regarding basic body plans in Cnidaria:
| I: | Polyp is sessile and cylindrical form as seen in Hydra and Adamsia. |
| II: | Medusa is umbrella-shaped and free swimming form as seen in Aurelia. |
| 1. | Only I is correct | 2. | Only II is correct |
| 3. | Both I and II are correct | 4. | Both I and II are incorrect |
Subtopic: Phylum Coelenterata |
89%
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In Obelia:
| a: | both polyp and medusa forms exist during its life cycle |
| b: | metagenesis, a sort of alternation of generation, is seen |
| c: | polyps produce medusae sexually and medusae form the polyps sexually |
| 1. | only a is correct | 2. | only a and b are correct |
| 3. | only c is correct | 4. | a, b and c are correct |
Subtopic: Phylum Coelenterata |
84%
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