Phylum of animal kingdom
Name the other phylum of animal kingdom present species with exoskeleton?
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Arthropods present exoskeleton made up of chitin. Echinoderms do not contain exoskeleton but they present a calcareous endoskeleton. Various chordates also contain an external carapace.
Which type of muscle tissue contracts and relaxes the heart chambers?
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How can the presence, function and localization of muscular tissue in beings of phylum Annelida be elucidated?
State some of the constituent elements of blood?
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Write down the three main cell types which form osseous tissue? And also write down their functions?
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Why can it be stated that the enzymatic action is extremely specific?
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