The strongest component of the cell wall<span> is a carbohydrate called cellulose, a polymer of glucose. The </span>cell wall gives rigidity<span> and strength to the </span>plant cells<span> which offers protection against mechanical stress. ... The </span>rigidity<span> of primary </span>plant<span> tissues is due to turgor pressure and not from rigid </span>cell walls<span>.</span>
1 hormones
2 external stimuli
Water freezes at 0°C, the lowest possible temp for any material is absolute zero and also most of these u can just google good luck!
How old it is compared to another specimen in relation.