<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>
Answer:
1. physical and chemical barriers
2.non-specific innate response
3. specific adaptive responses
Explanation:
I think it might be the first one: hiv infections. (hope this helps!)
Biologists do not fully understand DNA because there are constant changes and new discoveries developing.
It be like that sometimes
