Answer:
Those organisms are fit which has the ability to survive in harsh climatic condition and transfer their traits to the next generation through the process of reproduction.
Explanation: Fit means they are strong and compete with other organisms for food, shelter and other survival items. Those organisms which are not fit could not survive in harsh environmental conditions and removed from that ecosystem.
Fungi because of the rotting and in moist places
All,organisms are made up of one or more cells. The cell is the basic unit of all organisms. All cells come from existing cells. The scientific theory of cells is what scientists believe are true about cells.
It should be mandibular fossa :)