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 |
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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 |
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Statement I: | Planaria is a free-living flatworm and possesses high regeneration capacity. |
Statement II: | Hooks and suckers are present in parasitic flatworms. |
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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
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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 |
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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 |
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1. Annelida | 2. Platyhelminthes |
3. Aschelminthes | 4. Chordata |
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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. |
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