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Question
Which of the phylum includes segmented worms with closed circulation but without exoskeleton?
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Solution
The correct option is B Annelida
Annelids are the bilaterally symmetrical, triploblastic animals having a segmented body (internally and externally), they have true body cavity and body is covered by external cuticles. They have limited closed circulatory system as major blood vessels are present but distal blood capillaries are absent. So, the correct answer is option B.
Annelids are the bilaterally symmetrical, triploblastic animals having a segmented body (internally and externally), they have true body cavity and body is covered by external cuticles. They have limited closed circulatory system as major blood vessels are present but distal blood capillaries are absent. So, the correct answer is option B.
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