Question

You can bite fruits like guava, grapes, banana, etc but not a piece of wood. Why?

Answer 1

You can bite fruits like guava, grapes, banana, etc but not a piece of wood because it is hard in nature unlike fruits.                                                                           Our teeth are unable to bite wood because it is a harder substance when compared to a tooth.                                                                                                        Wood is hard because it contains numerous fibres to help support the structure of a tree.

Answer 2

Guava and banana fruits are made up of soft tissue and fibres of parenchyma while the wood is made up of hard fibres of sclerenchyma and xylem and phloem. That is why, it is easy to bite fruits like banana and guava than wood.