HSC Science (General) ११ वीं कक्षा - Maharashtra State Board Question Bank Solutions

The circulatory system has evolved from open to closed type in Animal kingdom. Which Phylum can be called first to represents closed circulation?

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Pinna is part of the external ear and it is found in mammals. Do aves and reptiles show external ear in any form?

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Fish and frog can respire in water. Can they respire through their skin? If yes, why do they have gills?

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Birds need to keep their body light to help in flying. Hence, they show presence of some organs only on one side. How their skeleton helps in reducing their weight?

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Cnidarians and Ctenophorans are both diploblastic. Which other character do they have in common, which is not found in other phyla?

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Crab and Snail both have a protective covering. Is it made up of the same material?

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Sponge and sea star show calcareous protective material. Do they belong to the same Phylum?

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Fish and snake both have scales. How do these scales differ from each other?

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Lower Phyla like Arthropods and Cnidarians show metamorphosis. Is it also found in any class of Phylum Chordata?

Draw a neat labelled diagram.

Sycon

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Aurelia

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Amphioxus

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Catla

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Balanoglossus

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Scolidon

Match the following.

Identify the animal given in the picture and write features of its phylum/class.

Identify the animal given in the picture and write features of its phylum/class.

Identify the animal given in the picture and write features of its phylum/class.

Identify the animal given in the picture and write features of its phylum/class.