Sympathetic vs. Parasympathetic. Both part of the autonomic nervous system, the sympathetic and parasympathetic nervous systems work involuntarily. Sympathetic is responsible for the response commonly referred to as "fight or flight," while parasympathetic is referred to as "rest and digest."
Nothing remains the same and habitats are constantly changing. There are two main types of succession, primary and secondary.
process providing most of the oxygen found
in Earth's atmosphere is >>>>>photosynthesis
Like organs in an organism, each organelle has a specific function in a cell. All of the organelles work together to carry out the functions of the cell as a whole, just as organs do to an organism. Each organelle contributes to the function of the cell as a whole, and they are essential for the cell's survival.
( NOT MY WORDS JUST WANTING TO HELP :) )