Предмет: География, автор: ZSHWGAW

чому негри чорні?????????


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Ответы

Автор ответа: toktarkulzere
1

Темна шкіра – це результат високого вмісту меланіну (меланінів). Меланін захищає шкіру від сонячного світла (ультрафіолету). Оскільки долоні та ступні багатьох негрів значно світліші, логічно припустити, що чорний колір шкіри не був початковим, а є набутим.

лучший ответ плиз

Автор ответа: BRINNER
1

Ответ:

Из за переизбытка мелонина в организме. Так как негры появились в местах ближе к экватору, где много солнечного света, у них в пигментах кожы отложился мелонин, который со временем перерос в переизбыточный пигмент. У обычного человека мелонин так же откладывается во время загара.

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