Why are a plant's stomata generally open during the day and closed at night?

Any sound above what db can cause hearing loss in human beings

1) what three conditions must be present for minerals to form through natural processes? 2) why are minerals considered inorganic substances? 3) how do oxides differ from other minerals that contain oxygen atoms? 4) how is a sulfide different from a sulfate? what makes native elements unique?

Adoença vitiligo afeta qual doença do corpo?