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huyenlinh22122002
2 năm trước
Giải thích sao lại chon cái đó nha Cho hình bên, hạt nảy mầm được để trong bình có nút kín trong khoảng 1,5 – 2giờ. Khi tiến hành thí nghiệm gắn ống thủy tinh chữ U vào thì gắn phễu và nhỏ từ từ nước cất vào bình chứa hạt nảy mầm. Khẳng định nào sau đây là đúng? A. Ống nghiệm chứa nước vôi trong hóa đục. B. Hạt nảy mầm có hô hấp nên trong bình sẽ nhiều O2 và rất ít CO2. C. CO2 tích lũy trong bình, nhẹ hơn không khí nên không khuếch tán ra bên ngoài. Nhỏ nước vào để khí CO2 tan hết vào nước trong bình chứa hạt.
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