Answer:
A decomposer is an organism that breaks down organic materials from dead organisms to obtain energy. These organisms are basically living recycling plants. Fungi, worms, and bacteria are all types of decomposers.
They are known for many things. They are the coldest climate, they have a very low period of reproduction which also implies that it has low biotic diversity, the organisms are usually simple when it comes to vegetation, the land is influenced by heavy frost when forming, and many many more things.
What subject? Is it it could be for anything
Answer:
Two characteristics are a notochord, and a dorsal hollow nerve cord.
Hope this helps! :D