Frog's heart<span> has one ventricle, while humans have 2, hence deoxygenated blood from body mixes with the oxygenated blood coming from lungs.
Source: S</span><span>ocratic</span>
Answer:
first step - take one-fourth of the field and cout the sunflowers in it
second step - find out the percentage and that will be you answer
Sorry for the handwriting
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