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Question
X is a phylum with organisms having true segmentations throughout their body. They have a true body cavity (coelom) and are seen in a variety of habitats. Identify the phylum X.
X is a phylum with organisms having true segmentations throughout their body. They have a true body cavity (coelom) and are seen in a variety of habitats. Identify the phylum X.
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Solution
The correct option is B Annelida
Phylum Annelida includes organisms that are bilaterally symmetrical and are triploblastic. They have metameric segmentation (true segmentation). Here the body is often divided both externally and internally into a number of segments. These organisms have a true coelom. The coelom is filled with coelomic fluid which contains cells. They occur in a variety of habitats (fresh water, marine water or moist soil). Some are free living, some are burrowing and a few are parasitic.
Phylum Annelida includes organisms that are bilaterally symmetrical and are triploblastic. They have metameric segmentation (true segmentation). Here the body is often divided both externally and internally into a number of segments. These organisms have a true coelom. The coelom is filled with coelomic fluid which contains cells. They occur in a variety of habitats (fresh water, marine water or moist soil). Some are free living, some are burrowing and a few are parasitic.
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