Answer:
trees
Explanation: its the only part of an ecosysstem that is living
Should be A the newer layers are usually on top
Time slows down. Einstein's Twin Theory states that if there were two identical twins, and one traveled in space at the speed of light while the other stayed on Earth for about 50 years, the twin in space would not have aged much, and the Earth twin would be an old man,
Chromosomes are tightly wound strands of DNA.
