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Q. No.The collared flagellated cell shown in the given figure is called as a:
1.
Choanocyte and helps sponges in movement of water through their canal system
2.
Choanocyte and helps sponges in reproducing asexually under favourable conditions
3.
Cnidocyte and helps sponges in catching their prey by paralyzing them
4.
Colloblast and helps sponges in sticking to a surface
Subtopic: Phylum Porifera |
62%
Level 2: 60%+
Hints
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 |
Level 3: 35%-60%
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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 |
74%
Level 2: 60%+
Hints
In Ctenophora:
The correct statements are:
| a: | body bears eight external rows of ciliated comb plates, which help in locomotion. |
| b: | reproduction takes place only by asexual means. |
| c: | digestion is both extracellular and intracellular. |
| d: | sexes are separate. |
| 1. | a and c only | 2. | b and d only |
| 3. | a, b and c only | 4. | a, b and d only |
Subtopic: Phylum Ctenophora |
65%
Level 2: 60%+
Hints
Members of the Phylum Platyhelminthes differ from animals belonging to Phylum Annelida and Phylum Arthropoda in:
| 1. | having two germ layers instead of three |
| 2. | lacking a coelom |
| 3. | showing bioluminescence |
| 4. | having a complete digestive system |
Subtopic: Phylum Platyhelminthes |
68%
Level 2: 60%+
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Metamerism evolved for the first time in the members of the Phylum:
| 1. | Annelida | 2. | Platyhelminthes |
| 3. | Aschelminthes | 4. | Chordata |
Subtopic: Phylum Annelida |
80%
Level 1: 80%+
Hints
Unlike Arthropods, Annelids:
| 1. | have a true coelom lined by embryonic mesoderm |
| 2. | have a closed circulatory system |
| 3. | do not reproduce by sexual methods |
| 4. | have a complete digestive system |
Subtopic: Phylum Annelida |
69%
Level 2: 60%+
Hints
Identify the incorrect statement regarding Mollusca:
| 1. | It is the second largest animal Phylum after Phylum Arthropoda. |
| 2. | It includes animals that are bilaterally symmetrical, triploblastic, and coelomate. |
| 3. | Body is covered with a calcareous shell and is metamerically segmented with a distinct head, muscular foot, and visceral hump. |
| 4. | Gills are present in the mantle cavity, a space between the mantle and the hump. |
Subtopic: Phylum Mollusca |
65%
Level 2: 60%+
Hints
Which of the following will be correct regarding Echinoderms?
| 1. | They have bilateral symmetry as adults and radial symmetry as larvae. |
| 2. | They are triploblastic and coelomates. |
| 3. | They possess a well-developed excretory system. |
| 4. | They have an incomplete digestive system. |
Subtopic: Phylum Echinodermata |
71%
Level 2: 60%+
Hints
Consider the given two statements:
| Statement 1: | Hemichordates were earlier considered as a sub-phylum under Phylum Chordata but are now placed separately in a phylum under non-Chordata. |
| Statement 2: | Hemichordates have a rudimentary structure in the collar region called stomochord, a structure homologous to the notochord. |
| 1. | Both Statement 1 and Statement 2 are correct but Statement 2 does not explain Statement 1. |
| 2. | Statement 1 is correct and Statement 2 is incorrect. |
| 3. | Both Statement 1 and Statement 2 are incorrect. |
| 4. | Both Statement 1 and Statement 2 are correct and Statement 2 explains Statement 1. |
Subtopic: Phylum Hemichordata |
Level 4: Below 35%
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