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

[EX Q]: What is the first direct action of growth hormone?
[EX A]: stimulation of triglyceride breakdown

[EX Q]: What is the lowest level of organism that can perform all activities required for life?
[EX A]: cell

[EX Q]: What do you call a growing mass of cancerous cells that pushes into nearby tissues?
[EX A]:
tumor