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Q. No.In Ctenophora:
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.
The correct statements are:
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 |
70%
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Consider the two statements:
1. Statement I is correct and Statement II is incorrect
2. Statement I is incorrect and Statement II is correct
3. Both Statement I and Statement II are correct
4. Both Statement I and Statement II are incorrect
| Statement I: | Planaria is a free-living flatworm and possesses high regeneration capacity. |
| Statement II: | Hooks and suckers are present in parasitic flatworms. |
2. Statement I is incorrect and Statement II is correct
3. Both Statement I and Statement II are correct
4. Both Statement I and Statement II are incorrect
Subtopic: Phylum Platyhelminthes |
86%
From NCERT
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The structure shown in the given figure helps flatworms in:
| 1. | Catching food and digesting it |
| 2. | Exchange of gases |
| 3. | Excretion and Osmoregulation |
| 4. | Regeneration of lost body parts |
Subtopic: Phylum Platyhelminthes |
87%
From NCERT
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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
1. having two germ layers instead of three
2. lacking a coelom
3. showing bioluminescence
4. having a complete digestive system
Subtopic: Phylum Platyhelminthes |
75%
From NCERT
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A worm:
In light of the above statements, it will be reasonable to conclude that this worm belongs to Phlyum:
| I: | has dorso-ventrally flattened body |
| II: | is an endoparasite in human beings |
| III: | has hooks and suckers present at its anterior end |
| 1. | Platyhelminthes | 2. | Annelida |
| 3. | Aschelminthes | 4. | Cnidaria |
Subtopic: Phylum Platyhelminthes |
91%
From NCERT
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Consider the following statements regarding roundworms:
The incorrect statement is/are:
| Statement I: | Alimentary canal is complete with a well-developed muscular pharynx. |
| Statement II: | An excretory tube removes body wastes from the body cavity through the excretory pore. |
| Statement III: | They are dioecious and males are longer than females. |
| 1. | Only Statement II |
| 2. | Only Statement III |
| 3. | Only Statement I and Statement II |
| 4. | Only Statement II and Statement III |
Subtopic: Phylum Aschelminthes |
64%
From NCERT
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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 |
85%
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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 |
76%
From NCERT
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Identify the incorrect statement regarding animals belonging to Phylum Annelida:
| 1. | Aquatic annelids like Nereis possess lateral appendages, parapodia, which help in swimming. |
| 2. | Nereis is dioecious. |
| 3. | Earthworm is monoecious. |
| 4. | Hirudinaria, blood-sucking leech, is an annelid that lacks true coelom and metamerism. |
Subtopic: Phylum Annelida |
87%
From NCERT
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Identify the correct statements regarding arthropods:
| I: | They are bilaterally symmetrical, triploblastic, non-segmented and pseudocoelomate animals. |
| II: | Arthropoda is the largest phylum of Animalia and includes more than 90 % of all species on the earth that are named so far. |
| III: | Insects are arthropods with body consisting of head, thorax and abdomen. |
| 1. | Only I | 2. | Only I and II |
| 3. | Only III | 4. | Only II and III |
Subtopic: Phylum Arthropoda |
62%
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