The most basic way to think of cancers is to say that they are caused by cells that are mutated somehow. All the cells in the human body are specialized for a certain type of job; for every type of specialized cell that mutates, a cancer can result.
There are so many different types because they are all used for different purposes in different situations.
Because there are so many different sorts of pathogens
The petroleum industry consists of so many different types of processes because so many different things can be made from petroleum.
Do you mean, why are there many different types of poems?
There are many different types of scientists because one person could not handle all the information of geology, astrology, and other types of science. Since there are numerous types of sciences, there has to be many different types of scientists, so there are many different scientists because there are many different sciences.
different enviroments lead to different types of them and also due to their diet
Many different moment throughout history created different forms
oh my word their is um um so many different types i cant believe you dont no ;)
There are many types of different weather, for example: rain, snow, hail, cloudy and so on....
Fungi is a kingdom.so there are so many species
There are so many different types of sludge that can be created. Sludge types can include but are not limited to chemical.
Cancer seems to come in many flavors with many different causes. Different treatments for different cancers are slowly making progress. Some cancers seem to have different properties from others. There is one uterine cancer that can be cured by a chemical. The earlier that cancers are found, the easier it is to cure them. No one researcher will find a cure for all cancers. A researcher will find a treatment for a cancer that is in a later stage than can be cured at present. Another researcher will find a treatment for a particular cancer that can not be cured at present. At least, that is the way it has worked so far.