AQA B16 Adaptations and Interdependence

What is an ecosystem?

• The interaction of a community of organisms with the non-living parts of their environment.

• The interaction of a community of organisms with the living parts of their environment.

• A collection of organisms that live in a particular environment.

A community is....

• a group of different organisms that live in a particular habitat

• a group of different organisms that have the same needs so have to get along

• a group of different organisms that depend on each other for their survival

• a group of different organisms that have the same behaviours

Communities of organisms are affected by biotic and abiotic factors. An abiotic factor is.....

• a living factor that affects the community

• a non-living factor that affects the community

Examples of biotic factors are....

• soil pH

• the temperature

• predators

• the light intensity

• diseases

Examples of abiotic factors are....

• soil pH

• the temperature

• predators

• the light intensity

• diseases

A community that can withstand fluctuations in the environment and has relatively constant populations of organisms is called a ___________ community.

Animals compete for the following resources....

• water, sunlight, oxygen and space

• food, water, sunlight and a mate

• a mate, food, space and water

• space, a mate, water and sunlight

Plants compete for the following resources....

• water, sunlight, oxygen and space

• nutrients, water, sunlight and space

• a mate, food, space and carbon dioxide

• space, a mate, water and sunlight

Which adaptations of a cactus help it to conserve water? Tick all that apply

• flat shape

• leaves that are reduced to spines

• swollen stems

• green

Which of the following are adaptations of animals that live in a cold environment?

• Thin fur

• Small ears

• A thick layer of subcutaneous fat

• Large feet

• Are often nocturnal