Food Webs, Parasites And Pollution (B1.3b) Flashcards
What is symbiosis?
A close relationship between two different species.
What is a parasite?
A species that gains an advantage from another species and causes it harm.
What are mutualists?
Species that gain mutual benefits from having a close relationship with each other.
What is a producer?
An organism that makes its own food.
What does a food chain do?
Shows what eats what.
What is eutrophication?
The process of making too much food.
What is a trophic level?
A level of a food chain.
What is biomass?
The total mass in living organisms.
What is nitrogen-fixing bacteria?
Bacteria that can turn nitrogen into nitrogen compounds.
What is a pollutant?
A substance that harms living organisms when released into the environment.
What is urea?
A nitrogen-rich substance in urine.
What is nitrifying bacteria?
Bacteria that can convert ammonia to nitrates.
What is denitrifying bacteria?
Bacteria that will convert the nitrates back to nitrites.
