Given a scientific question, generate a correct answer to it.
--------
Question: What term is used to describe major changes in the genetic material?

Answer: chromosomal alterations

Question: The energy that enters the chloroplasts as sunlight becomes stored as what type of energy in organic compounds?

Answer: chemical energy

Question: What instruments used in guidance systems to indicate directions in space must have an angular momentum that does not change in direction?

Answer:
gyroscopes