Does a killer whale have an endoskeleton or an exoskeleton?

Does a killer whale have an endoskeleton or an exoskeleton?
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All whales have internal skeletons and are vertebrates.
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A chordate character is (a) gills (b) spiracles (c) post-anal tail (d) chitinous exoskeleton

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.A common characteristic of all vertebrates without exception is (a) the division of body into head, neck, trunk and tail (b) their body covered with an exoskeleton (c) the possession of two pairs of functional appendages (d) the presence of well-developed skull

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In which one of the following, the genus name, its two characters and its phylum are not correctly matched, whereas the remaining three are correct? (a) Pila (i) Body segmented Mollusca (ii) Mouth with radula(b) Asterias (i) Spiny skinned Echinodermata (ii) Water vascular system (c) Sycon (i) Pore bearing Porifera (ii) Canal system (d) Periplaneta (i) Jointed appendages Arthropoda (ii) Chitinous exoskeleton

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In which one of the following, the genus name, its two characters and its phylum are not correctly matched, whereas the remaining three are correct? (a) Pila (i) Body segmented Mollusca (ii) Mouth with radula(b) Asterias (i) Spiny skinned Echinodermata (ii) Water vascular system (c) Sycon (i) Pore bearing Porifera (ii) Canal system (d) Periplaneta (i) Jointed appendages Arthropoda (ii) Chitinous exoskeleton

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Match the name of the animal (column I), with one characteristic (column II) and the phylum/ class (column  III) to which it belongs.(a) Limulus Body covered Pisces by chitinous exoskeleton (b) Adamsia Radially Porifera symmetrical (c) Petromyzon Ectoparasite Cyclostomata (d) Ichthyophis Terrestrial Reptilia

Description : Match the name of the animal (column I), with one characteristic (column II) and the phylum/ class (column  III) to which it belongs. (a) Limulus Body covered ... exoskeleton (b) Adamsia Radially Porifera symmetrical (c) Petromyzon Ectoparasite Cyclostomata (d) Ichthyophis Terrestrial Reptilia

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Which of the following characteristics is mainly responsible for diversification of insects on land? (a) Exoskeleton (b) Eyes (c) Segmentation (d) Bilateral symmetry

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