PIMSO 2022 - Science - Grade 5 - National Round Question 1

Question 1

Mimosa pudica is a plant known for seismonastic movement by folding of the leaflets upon mechanical stimulation. How do the leaflets fold upon stimulation?

1. Changes in the water pressure in the leaflet
2. Changes in the electrical signal in the leaflet
3. Changes in the glucose level in the leaflet
4. Changes in the chlorophyll pigment in the leaflet
5. e Changes in the gravity in the leaflet