Well... a "build up in blood vessels" is actually called a CLOT. That should help you. :)
Classification systems are essential to science; they act as the scaffolding that enables scientists to stand up close and get to know plants
Biotic factors are anything in a ecosystem that is living, was living, or is going to live.
From this we can conclude that the biotic factors are remains of dead organisms and flora and fauna.
Temperature and minerals in the soil are abiotic, meaning they will never live.
