Combined Science (Biology - Topic 7 -
Ecology) Test Questions With Complete
Solutions.
What is an ecosystem? - Answer An ecosystem is the interaction of a community of living organisms
(biotic) with the non-living (abiotic) parts of their environment.
What do organisms require from their surroundings in order to survive and reproduce? - Answer A
supply of materials from their surroundings
State four factors plants compete with each other for. - Answer Space, light, mineral ions, water
State three factors animals compete with each other for. - Answer Food, mates, territory
What is interdependence? - Answer Each species within a community depend on others for food,
shelter, pollination, seed dispersal, etc. If one species is removed, this will affect the whole community.
In a stable community, what should be a common trend in the populations of all the different species? -
Answer All of the species and environmental factors will be in balance so that population sizes remain
fairly constant.
What is an abiotic factor? - Answer A non-living factor which can affect a community.
State 3 of the 7 possible abiotic factors which may affect a community. - Answer Light intensity,
temperature, moisture levels, soil pH and mineral content, wind intensity (and direction), carbon dioxide
concentration, oxygen concentration
What is a biotic factor? - Answer A living factor which may affect a community.
State all 4 possible biotic factors which may affect a community. - Answer Availability of food, new
predators, new pathogens, being outcompeted
Ecology) Test Questions With Complete
Solutions.
What is an ecosystem? - Answer An ecosystem is the interaction of a community of living organisms
(biotic) with the non-living (abiotic) parts of their environment.
What do organisms require from their surroundings in order to survive and reproduce? - Answer A
supply of materials from their surroundings
State four factors plants compete with each other for. - Answer Space, light, mineral ions, water
State three factors animals compete with each other for. - Answer Food, mates, territory
What is interdependence? - Answer Each species within a community depend on others for food,
shelter, pollination, seed dispersal, etc. If one species is removed, this will affect the whole community.
In a stable community, what should be a common trend in the populations of all the different species? -
Answer All of the species and environmental factors will be in balance so that population sizes remain
fairly constant.
What is an abiotic factor? - Answer A non-living factor which can affect a community.
State 3 of the 7 possible abiotic factors which may affect a community. - Answer Light intensity,
temperature, moisture levels, soil pH and mineral content, wind intensity (and direction), carbon dioxide
concentration, oxygen concentration
What is a biotic factor? - Answer A living factor which may affect a community.
State all 4 possible biotic factors which may affect a community. - Answer Availability of food, new
predators, new pathogens, being outcompeted
