There shape, if they need oxygen, and where they live.
There are different ways to classify bacteria, because there are many functions to bacteria. A phenotypic system is one way to classify bacteria.
Two different ways to classify mollusks are by the muscular foot located inside of their bodies. They have three different types of feet, the head foot, hatchet foot and the stomach foot.
by how long it is
The seven different ways to scientifically classify plants: APG system, APG II system, APG III system, Bessey system, Cronquist system, Melchior system.
in and out the tide is out the tide is in
incoming, outgoing and cross
u could classy do it by
reduction of O2 oxidation of H2 combustion of H2
Combustion, Syntheses, and Decomposition
Isosceles, equilateral, right angle, obtuse and scalene
by cheese cakes
i think u can classify it in 2 ways