In 1980, a massive volcanic eruption of Mount St. Helen's in Washington State covered a large area with lava and ash. By 2010, plants were growing in the area, including some small trees.
a. What type of ecological succession had occurred?
b. How do you know?
c. Describe how living things colonized the bare rock.

the generally accepted parts of modern cell theory include: all known living things are made up of one or more cells. all living cells arise from pre-existing cells by division. the cell is the fundamental unit of structure and function in all living organisms.

hydrogen is a compound or a single element and a element is a pure substence that cannot be separated into simpler subtances

clorine is a compound its a chemical substance that forms when two or more different elements combine

so both hydrogen and clorine are compounds