Why do internodal segments of sugarcane fail to propagate vegetatively even when they are in contact with damp soil?

Why should circuits containing capacitor be handled cautiously, even when there is no current?

When we come in contact with dust, we often sneeze. Why?

Why do the symptoms of malaria not appear immediately affer the entry of sproozoites into the human body when bitten by female Anopheles? Explain.

Why do plants die in the water logged soil?