2.69 understand that plants respond to stimuli

2.69 •plants respond to stimuli to survive

                  •they sense the direction of light and grow towards it to maximise light absorption for photosynthesis 

                  •they can sense gravity, so their shoots and roots grow against it

                  •climbing plants have touch so they can climb and reach the sunlight

        •plants survive if they respond to the predators 

                  •some produce toxins to avoid being eaten

        •plants are more likely to survive if they respond to abiotic stress 

                  •they can produce anti-freeze proteins