Season 1, Episode 3: Denial, Anger, Acceptance. Tony encourages an unwanted son-in-law to divorce, Carmela learns another secret of Tony's, Meadow experiments with speed to study for the SATs, and Chris and Brendan find out the price of disrespecting Junior.
Fungi are the principal decomposers in ecological systems. These and other differences place fungi in a single group of related organisms, named the Eumycota (true fungi or Eumycetes), which share a common ancestor (is a monophyletic group), an interpretation that is also strongly supported by molecular phylogenetics.
A decomposer is an organism that breaks down waste and dead organisms into nutrients for the producers. These can be fungi, animals, bacteria, etc... An ecological niche is the role or function the organisms has in its ecosystem. For example, an owl's niche would be that of a hunter in his ecosystem. I hope this helps a bit.