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emmainna [20.7K]
3 years ago
13

The newborn's brain is about 25 percent of its adult weight by birth; by the second birthday, the brain is about ________ percen

t of its adult weight.
Biology
1 answer:
Alina [70]3 years ago
7 0
<span>50 percent. Newborn has very low listening ability and learning as brain develops the child will learn new things and his brain starts to grow big .Brain will adapt the language,color ,light,people faces and then child will learn fast</span>
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