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Metamerism is an important character of annelida and arthropoda. The body is divided externally into segments called metameres. Metamerism is also exhibited by chordata due to repetition of a succession of homologous structures along antero-posterior axis.

1. a) True for all
2. b) True for annelida and arthropoda only
3. c) True for chordata only
4. d) True for arthropoda only

Correct answer: a) True for all

Solution

Annelids and arthropods are classic examples of metamerism because their bodies are externally segmented into metameres. Chordates also show serial repetition of homologous structures along the anteroposterior axis, so the statement applies to all three groups.

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