Q. No.One of the representatives of the phylum Arthropoda is:
1. Silverfish
2. Pufferfish
3. Flying fish
4. Cuttlefish
In which one of the following the genus name, its two characters and its class/phylum are correctly matched?
| Genus | Two Characters | Class/phylum |
| (a) Salman dra | (i) A tympanum represents ear (ii) Fertilisation is external |
Amphibia |
| (b) Pteropus | (i) Skin possesses hair (ii) Oviparous |
Mammalia |
| (c) Aurelia | (i) Cnidobles (ii) organ level of Organisation |
Coelenterata |
| (d) Ascaris | (i) Body segmented (ii) Males and Female distinct |
Annelida |
2. (b)
3. (c)
4. (d)
| 1. | absence of true coelom but the presence of metamerism |
| 2. | presence of neither true coelom nor metamerism |
| 3. | presence of true coelom but the absence of metamerism |
| 4. | presence of true coelom and metamerism (metamerisation) |
Which one of the following has an open circulatory system?
1. Pheretima
2. Periplaneta
3. Hirudinaria
4. Octopus
Which type of cells are absent in sponges?
1. Trophocytes
2. Myocytes
3. Archaeocytes
4. Cnidocytes
The structure present in all adult vertebrates is:
1. Notochord
2. Dorsal tubular nerve cord
3. Pharyngeal gill slits
4. All of the above
Which one of the following is not a vertebrate?
1. Sea cow
2. Sea lion
3. Sea horse
4. Sea hare
The canal system is a characteristic feature of:
1. echinoderms
2. helminths
3. coelenterates
4. sponges
Chondrichthyes is characterised by:
1. placoid scale
2. ventral mouth
3. ctenoid scale and ventral mouth
4. placoid scale and ventral mouth
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