The twentieth century was often called the Era of the Book. In those days, there were books about everything, from ant eaters to Zulus. Books taught people how , when , where , and why to everything. They illustrated, educated, punctuated, and even decorated
| Class | 0 – 15 | 15 – 30 | 30 – 45 | 45 – 60 | 60 – 75 | 75 – 90 |
|---|---|---|---|---|---|---|
| Frequency | 11 | 8 | 15 | 7 | 10 | 9 |
Leaves of the sensitive plant move very quickly in response to ‘touch’. How is this stimulus of touch communicated and explain how the movement takes place?