The abundance and distribution of organisms in an ecosystem is determined by biotic and abiotic factors. Animals and plants compete for resources.
What term describes all the living things and the non-living things in an area?
Population
Ecosystem
Community
What term describes all the living things in an area?
Which of these is a biotic factor?
Predation
Light
Salinity
Which of these is an abiotic factor?
Pathogens
Moisture levels
Predators
Which of these factors do plants compete for in the environment?
Food
Mates
Which of these factors do animals compete for in the environment?
Minerals
What would happen to the numbers of predators if the number of prey suddenly decreased?
Population numbers would decrease
Population numbers would stay the same
Population numbers would increase
What would happen to the numbers of prey if the number of predator decreased because of an outbreak of disease?
Prey numbers would increase
Prey numbers would decrease
Prey numbers would stay the same
Why did the introduction of the grey squirrel in Britain affect the population of the red squirrel?
Pollution
Competition
What term describes all organisms in a community?
Independent
Interdependent
Unconnected