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

[EX Q]: What are the dark areas that appear on the sun called?
[EX A]: sunspots

[EX Q]: How is a mammal developed if not inside of a placenta or a pouch?
[EX A]: hatched from eggs

[EX Q]: Programmed cell death is also known as?
[EX A]:
apoptosis