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Question
Which of the following pairs of phyla exhibit segmentation?
Which of the following pairs of phyla exhibit segmentation?
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Solution
The correct option is C Annelida and Arthropoda
Metamerism or segmentation is the phenomenon of having a linear series of body segments fundamentally similar in structure. The individual segments are known as metameres. However, not all these segments are entirely alike in any single life form because some of them perform special functions. Metameric segmentation can be distinctly seen in Annelida (e.g., earthworm) and Arthropoda (e.g., cockroach, prawn etc.). Most chordates too, exhibit segmentation at some point during their life history.
Metamerism or segmentation is the phenomenon of having a linear series of body segments fundamentally similar in structure. The individual segments are known as metameres. However, not all these segments are entirely alike in any single life form because some of them perform special functions. Metameric segmentation can be distinctly seen in Annelida (e.g., earthworm) and Arthropoda (e.g., cockroach, prawn etc.). Most chordates too, exhibit segmentation at some point during their life history.
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