This doesn't mean you don't have a good general knowledge. After all, we may have just caught you on some stuff you had holes about.
They are all greenhouse gasses They are all harmless to breathe They are all man-made gases They are all noble gases What do Albert Einstein, Bob Dylan and Bill Clinton have in common?
Helios means sun. Heliófitas Ciófitas Hidrófitas Xerófitas Qual é a maior célula do mundo? Embrião de elefante Ovo de avestruz Embrião humano Ovo de crocodilo Como o corpo processa e cria vitamina D? Raios ultravioletas convertem o óleo da pele em vitamina D.
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