Chapter 9 - Ecosystems

Question 1

Different levels of ecosystems

Answer 1

Individual - a single organism
Population - all the organisms of one species in that habitat
Community - all the organisms of one species in that habitat
Ecosystem - A community of all organisms with the non living factors

Question 2

Interdependence

Answer 2

• A community organsims relying upon each other for survival and reproduction
• If there is a change in numbers for one species then there will be huge knock on effects

Question 3

Mutualism

Answer 3

• A relationship between two organisms in which both organisms benefit
• Bees and flowers have a mutualistic relationship
• Bees visit flowers to gain necter and pollen is spread to them. When bees land on other plants, they spread the pollen
• This feeds bees and helps plants reproduce

Question 4

Parasitism

Answer 4

• A relationship in which only one species benefit
• They live closely to the host species
• An example is fleas as they feed on the hosts blood whilst the host gets no benefit

Question 5

Abiotic factors - non-living

Answer 5

Temperature - the distribution of some species is dependent on the temperature. This is represented by malaria spreading north as it is a temperature dependent disease