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Q. No.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%
From NCERT
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Match each item in Column I with their correct match in Column II and select the answer from the codes given:
Codes:
| Column I | Column II | ||
| A. | Physalia | P. | Sea-fan |
| B. | Adamsia | Q. | Sea anemone |
| C. | Pennatula | R. | Sea-pen |
| D. | Gorgonia | S. | Portuguese men of war |
| A | B | C | D | |
| 1. | S | Q | R | P |
| 2. | S | R | Q | P |
| 3. | P | Q | R | S |
| 4. | S | P | Q | R |
Subtopic: Phylum Coelenterata |
90%
From NCERT
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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 Ctenophora & Platyhelminthes |
84%
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 Ctenophora & Platyhelminthes |
90%
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 |
66%
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 |
86%
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 |
59%
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Match each item in Column I with one in Column II and select the correct match from the codes given:
Codes:
| Column I | Column II | ||
| A. | Insect reared for producing silk | P. | Locusta |
| B. | Mosquito acting as vector for Dengue virus | Q. | Bombyx |
| C. | Gregarious pest | R. | Limulus |
| D. | Living fossil | S. | Aedes |
Codes:
| A | B | C | D | |
| 1. | Q | S | P | R |
| 2. | Q | S | R | P |
| 3. | P | Q | R | S |
| 4. | R | P | Q | S |
Subtopic: Phylum Arthropoda |
90%
From NCERT
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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 |
75%
From NCERT
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Identify the incorrectly matched pair:
| 1. | Pinctada | Pearl Oyster |
| 2. | Aplysia | Sea hare |
| 3. | Dentalium | Tusk shell |
| 4. | Loligo | Devil fish |
Subtopic: Phylum Mollusca |
85%
From NCERT
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