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some people have cancer tumors removed, and their cancer never returns. other people with cancer must be treated with drugs and radiation. explain why.

My best explanation is

Some cancer is in blood and tissue and doesn’t form a tumor, such as leukemia. Therefore a usage of “chemotherapy” is needed.

Sorry if this isn’t a good explanation

Depending on the type of cancer and stage it’s in, that alters many variables in treatment. An example, having a cancerous cyst being removed is more likely to remain healthy, than more complex problems like blood which is why leukemia can be fatal.

name and explain one of the event that occurs during meiosis that increases the variation in offspring even more than simple reproduction?

c. live where it’s cold and icy