Here take a look at this, https://quizlet.com/13481242/levels-of-biological-organization-mrs-lloyd-flash-cards/
These are called invasive species (like the Giant African Snails in Galapagos for example.)
I believe it would be to calculate the amount of C-14 atoms left. scientists began to find out how long an object has been decaying, this has to do with half lifes etc. and how long a specific mineral/elements half life is. they use this to calculate how old it is (not an exact age but it's very accurate.)
A common pioneer organism<span> in a primary </span>succession<span> is the. icº, ) - 3. The final stable state of a </span>succession is called the<span> (Mººp community</span>
