There are many different species of diatoms, and the different species are different in shape and size.
the difference between a two dimensional shape and and a solid is that a two dimensional shape is plane and a solid you can see the whole shape a the inside.
If two sides are parallel and the other two aren't, the shape is a trapezoid.
a polygon means a shape with angles. a two sided shape doesnt exist. you need three sides to make a shape.
No shape can have two corners
Coevolution is that term.
coevolution
D, coevolution
COevolution
coevolution
coevolution
coevolution
Coevolution
Called coevolution.
coevolution
coevolution
Coevolution