When you rub your hands together on a cold day, you use friction to convert
a. mechanical energy into thermal energy
b. thermal energy into nuclear energy
c. nuclear energy into electrical energy
d. electrical energy into electromagnetic energy

one is through turgidity. this occurs before ground tissue ( collenchyma

and sclerenchyma cells) become well

developed to give structural support to the plant as it grows bigger. the xylem

tissue (composed of rigid tissue) of the young

plant render this support and also maintaining osmotic turgidity of the surrounding

plant cells.