Question

environmental factors can \cause\ cancer by causing a mutation in a cell directly or by..... * 2 points
mutating neighboring cells
causing cells to grow/multiple more rapidly
altering your chromosomes
calling taco bell and ordering a chalupa with extra oncogenes.

oncogenes are defined as regions of dna that... * 2 points
regulate normal cell growth.
turn on regulatory proteins in the immune system.
recognize abnormal growth of cells and stop it.
work for taco bell in an advisory capacity.

Explanation:

1. Environmental factors can cause cancer not only by directly mutating a cell but also by causing cells to grow or multiply more rapidly. Mutating neighboring cells is not the typical secondary - way for environmental - factor - induced cancer compared to rapid cell growth. Altering chromosomes is a part of the mutation process which is already covered in the direct - mutation part. The Taco Bell option is a joke.
2. Oncogenes are regions of DNA that when mutated or over - expressed can lead to cancer. Their normal function is related to regulating cell growth. They do not turn on regulatory proteins in the immune system, nor do they recognize and stop abnormal cell growth (tumor - suppressor genes do that). The Taco Bell option is a joke.

Answer:

1. causing cells to grow/multiple more rapidly
2. regulate normal cell growth.