Given a scientific question, generate a correct answer to it.

[EX Q]: For most of a star's life, hydrogen atoms fuse to form what?
[EX A]: helium atoms

[EX Q]: What are the two types of vascular tissues found in vascular plants?
[EX A]: xylem and phloem

[EX Q]: Depending on a tumor's location, for example, cancer surgeons may be unable to remove it. radiation and chemotherapy are difficult, and it is often impossible to target only the cancer cells. the treatments inevitably destroy this?
[EX A]:
healthy cells