Q. No.Which one of the following is not a characteristic of phylum Annelida?
1. Pseudocoelom
2. Ventral nerve cord
3. Closed circulatory system
4. Segmentation
1. Pseudocoelom
2. Ventral nerve cord
3. Closed circulatory system
4. Segmentation
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Which one of the following pairs of items correctly belong to the category of organs mentioned against it?
1. Nephridia of earthworm and malpighian tubules of cockroach - excretory organs.
2. Wings of honey bee and wings of crow - homologous organs
3. Thorns of Bougainvilea and tendrils of Cucurbita - analogous organs
4. Nictitating membrane and blind spot in human eye - vestigial organs
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Which one of the following phyla is correctly matched with its two general characteristics?
1. Echinodermata - pentamerous radial symmetry and mostly internal fertilization
2. Mollusca - normally oviparous and development through a trochophore or veliger larva
3. Arthropoda - body divided into head, thorax and abdomen and respiration by mouth
4. Chordata - notochord at some stage, separate anal and urinary openings to the outside
Which one of the following groups of animals is bilaterally symmetrical and triploblastic?
1. Sponges
2. Coelenterates (cnidarians)
3. Aschelminthes (round worms)
4. Ctenophores
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One example of animals having a single opening to the outside that serves both as mouth as well as anus is–
1. Asterias
2. Ascidia
3. Fasciola
4. Octopus
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Which one of the following kinds of animals are triploblastic ?
1. Sponges
2. Ctenophores
3. Corals
4. Flat worms
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Which one of the following statements about certain given animals is correct?
1. Molluscs are acoelomates
2. Insects are pseudocoelomoates
3. Flatworms (Platyhelminthes) are coelomates
4. Roundworms (Aschelminthes) are pseudocoelomates
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Which one of the following statements about all the four - Spongilla, Leech, Dolphin, Penguin - is correct?
| 1. | Leech is a freshwater form while all others are marine. |
| 2. | Spongilla has special collar cells called choanocytes, not found in the remaining three. |
| 3. | All are bilaterally symmetrical. |
| 4. | Penguin is homeothermic while the remaining three are poikilothermic. |
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Excretory pore of Ascaris is present –
1. Behind the mouth
2. On the posterior end
3. On the dorsal side
4. In the middle of the body
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