Return to text . A mycelium is the network of hyphae that make up the vegetative mat of a fungus. Return to text . A hypha is a filament that makes up a fungal mycelium. Return to text .
Bacteria are prokaryotes because they lack a clearly defined nucleus and sub-cellular organelles.
Return to text . A parasite is an organism that derives its nutrients from another living organism, often but not always to the detriment of its host. Return to text . The term prokaryote is derived from two Greek words pro- and karyon meaning 'before the nucleus'. Return to text .