DNA Helix, DNA Supercoils, Nucleosome, Chromosome
Small < Large
She would find oxygen (O2) in the test tube because plants give off oxygen
I think a fossil? Thats my guess.
Answer:
In secondary succession, a previously occupied area is re-colonized following a disturbance that kills much or all of its community. A classic example of secondary succession occurs in oak and hickory forests cleared by wildfire. Wildfires will burn most vegetation and kill animals unable to flee the area.