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#Question id: 10978


Which of the following events occurs at the end of the period of ventricular ejection?

#SCPH06 I Botany
  1. Aortic valve opens
  2. Aortic valve remains open
  3. A-V valves open
  4. Pulmonary valve closes

Answer:- Option(s): 4


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Which animal reptiles exist in the Permian periods of Paleozoic era?

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