The answers is chromosomes
Answer:
Longer hydrocarbon molecules have a stronger intermolecular force. More energy is needed to move them apart so they have higher boiling points . This makes them less volatile and therefore less flammable .
Answer:
a. preserved remains or traces of a living thing
Explanation:
c & d already dont make any sense because we aren't talking about earth. b seems like it would be correct but fossils are preserved
External stimulus is an allergen. hope this helps <3