Qaysi hayvonning yuragi faqat yurak oldi bo’lmasi va yurak qorinchasidan iborat bo’lib qon aylanish sistemasi ochiq bo’ladi?

  1. daryo qisqichbaqasi
  2. mollyuskalar
  3. yomg’ir chuvalchabgi
  4. o’rgimchaksimonlar
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Question 427 of 1216
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