Ancient Greek philosophers.
Crystals of the same substance form a similar structure in nature, but there are many basic crystaline structures in different substances
till
till
Cells are different shapes and sizes because they have different functions. The functions dictate the shapes and sizes.
There are different formulae for different shapes.
If they are the same shapes but differ only in size, then they are SIMILAR shapes. Otherwise, they are simply different shapes.
Urticaria
because the wind blows them into different shapes. :)
Yes - even shapes with different area.
To perform different functions plant cells assume different shapes
This is because the animals which live in them have different shapes and sizes.
Yes many different shapes can have the same volume