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phny2003
2 năm trước
Một học sinh làm tiêu bản thí nghiệm co nguyên sinh, quan sát thấy khí khổng đóng, sau khi quan sát xong bạn ấy nhỏ 1 giọt nước cất vào rìa của lá kính trên tiêu bản sau đó quan sát thấy khí khổng mở. Hãy giải thích tại sao lúc này khí khổng lại mở ra?
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