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Heart to pump blood evolved for the first time in
  • a)
    annelids    
  • b)
    arthropods
  • c)
    roundworms
  • d)
    Flatworms
Correct answer is option 'A'. Can you explain this answer?
Most Upvoted Answer
Heart to pump blood evolved for the first time ina)annelids b)arthropo...
Annelids 1st developed blood vascular system. These does not have hearts blood vessels actually acts as hearts as seen in earthworms.
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Community Answer
Heart to pump blood evolved for the first time ina)annelids b)arthropo...
Much like humans, annelids also have a closed circultatory system, which means the blood pumping from heart to organ.
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Heart to pump blood evolved for the first time ina)annelids b)arthropodsc)roundwormsd)FlatwormsCorrect answer is option 'A'. Can you explain this answer?
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