Always harmful to their host
Fungi and Bacteria that gain nutrients from once living organisms are called decomposers. Organisms that gain nutrients from living organisms is called parasites.
parasites
Organisms who use another organism to flourish are called parasites.
A parasite lives on another organism. Not all microorganisms are parasites. Many parasites are very small and are called microorganisms. Many algae are microscopic and are microorganisms put do not live on any other organisms. Mosquitoes need blood and will bite humans but they can be seen. They are parasites since they need a blood meal.
A relationship in which one kind of organism lives on or in another organism an may harm the organism is called parasitism. The organisms that live on or in other organisms are parasites. The organisms they feed on are called hosts. The parasites benefit from the relationship. The hosts are harmed by it. JUST TO LET YOU KNOW I GOT ALL THIS INFORMATION FROM AN AUDUBON TRADITIONAL ELEMENTARY SCHOOL!
Parasites.
These organisms are called parasites.
Parasitism .
Sounds like you're talking about a parasite.
They are called parasites
scavengers or parasites they can also be called decomposers or the more biological term would be saprophytes
Protozoa, fungi and multicellular organisms can be parasites.
Parasites
Fungi and Bacteria that gain nutrients from once living organisms are called decomposers. Organisms that gain nutrients from living organisms is called parasites.
Parasitology is the study of parasites, which are organisms which obtain nourishment and protection from other living organisms. Parasitology is closely related to cell biology, biochemistry, and ecology.
parasites
Organisms that feed on each other are called parasites. There is the host (the one that is getting used) and the parasite (the one who sucks the blood). Organisms like ticks are parasites, sucking on human or dog blood. (You have probably seen them on your arms/legs)