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Earn 100
In some chordates, the notochord is modified as the vertebral column. Such animals are called vertebrates. Which one of the following statements makes sense?
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Important Questions on Animal Kingdom
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A common characteristic of all vertebrates without exception is
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Go through the following flow chart for the division of subphylum Vertebrata. Fill in the gaps A, B, C, and D and select the correct option.
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Match column I with II and select the correct option from the given codes.
| I | II | ||
|---|---|---|---|
| (a) | Wings | (i) | Reptiles |
| (b) | Operculum | (ii) | Chondrichthyes |
| (c) | Scutes | (iii) | Birds |
| (d) | Cartilaginous endoskeleton | (iv) | Osteichthyes |
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Match the excretory organs listed under column I with the animals given under column II and select the correct option.
I (Excretory organs) |
II (Animals) |
||
|---|---|---|---|
| (a) | Nephridia | (i) | Hydra |
| (b) | Malpighian tubules | (ii) | Leech |
| (c) | Protonephridia | (iii) | Shark |
| (d) | Kidneys | (iv) | Roundworms |
| (v) | Cockroach |
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To which classes do the following animals belong?
A — Petromyzon, B — Scoliodon, C — Pristis
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Which of the following is/are not the characteristics of the Class Osteichthyes?
(i) Body is streamlined and mouth is terminal.
(ii) Gills are covered by operculum.
(iii) Skin covered with cycloid and placoid scales.
(iv) Many of them are viviparous.
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Select the correct option in respect of characteristics of each group.
| Cyclostomes | Chondrichthyes | Osteichthyes | |
|---|---|---|---|
| (i) | Sucking mouth | Ventral mouth | Terminal mouth |
| (ii) | Scales absent | Placoid scales | Cycloid/Ctenoid scales |
| (iii) | Marine | Marine | Marine and freshwater |
| (iv) | pairs of gills |
pairs of gills without operculum |
pairs of gills with operculum |
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Match column I with II and select the correct option from the given codes.
| I | II | ||
|---|---|---|---|
| (a) | Cartilaginous fishes | (i) | Usually external fertilisation |
| (b) | Bony fishes | (ii) (iii) (iv) (v) |
Internal fertilization Mostly oviparous Mostly viviparous Direct development |
