Question

which of the following is true of benign tumors but not malignant tumors?
they migrate from the initial site of transformation to other organs or tissues.
they have an unusual number of chromosomes.
they remain confined to their original site.
they are the result of the transformation of normal cells.
they can divide indefinitely if an adequate supply of nutrients is available.

Explanation:

Benign tumors do not invade surrounding tissues or spread (metastasize) to other parts of the body. Malignant tumors can metastasize. Having an unusual number of chromosomes, being the result of normal cell transformation, and being able to divide indefinitely with nutrients are characteristics of both (though the 'indefinite division' for benign is more restricted in growth pattern in terms of not spreading).

Answer:

They remain confined to their original site.