Correct Option
The correct option is It excludes dead animal remains and fecal matter..
Explanation
Detritus refers to the raw organic material that serves as the substrate for decomposition in an ecosystem. It is the starting point of the detritus food chain and is essential for nutrient cycling.
Option Analysis
- It excludes dead animal remains and fecal matter. is the correct answer (Incorrect Statement): Detritus does not exclude dead animal remains or fecal matter. On the contrary, it explicitly comprises dead remains of animals (corpses) and their excretory products.
- It includes dead plant parts such as leaves and bark. is a correct statement: Detritus includes dead plant parts such as leaves, bark, flowers, and other vegetative residues that fall onto the soil.
- It includes fecal matter of animals. is a correct statement: Fecal matter and other animal wastes are integral components of detritus, providing nutrients for decomposers.
- It acts as the raw material for decomposition. is a correct statement: Detritus acts as the primary raw material for decomposition, a process where complex organic matter is broken down into inorganic substances like carbon dioxide, water, and nutrients by detritivores and decomposers.
Key Takeaway
Detritus consists of dead plant parts (leaves, bark, flowers), dead animal remains, and fecal matter. It serves as the essential raw material for decomposition and the base of the detritus food chain.