+
Related Flashcards
Related Topics
Cards In This Set
| Front | Back |
|
Define species
|
A group of organisms that can interbreed and produce fertile offspring. they have a common gene pool
|
|
Define habitat
|
The environment in which a species normally lives or the location of a living organism
e.g tree branch, cliff face, seashore |
|
Define population
|
A group of organisms of the same species which live in the same area at the same time
|
|
Define community
|
A group of populations living and interacting with each other in an area
e.g the soil community in a forest or the fish community in a river |
|
Define ecosystem
|
A community and its abiotic environment
refers to where a group of interacting populations live instead of where a single species lives (habitat) e.g forest, pond, ocean |
|
Define ecology
|
The study of the relationships between living organisms and between organisms and their environment
|
|
What four components make up the environment
|
Hydrosphere - water
atmosphere - gases lithosphere - rocks biosphere - all living organisms |
|
Give 5 examples of abiotic components in an environment
|
Light, heat, minerals, oxygen, humidity
|
|
What is an example of a heterotroph feeding on an autotroph?
|
A sheep feeding on grass
|
|
What are autotrophs?
|
Organisms capable of making their own molecules as a food source
|
|
How do autotrophs synthesise their own organic molecules
|
They use light energy from the sun and combine it with inorganic substances to obtain chemical energy in the form of organic compounds
|
|
What are 4 examples of autotrophs
|
Grass, trees, algae, cyanobacteria
|
|
What must heterotrophs do?
|
Obtain organic molecules from other organisms
they do this by ingesting organic matter that is living or has recently been killed |
|
What are 4 examples of heterotrophs
|
Zooplankton, fish, sheep, insects
|
|
What are detritovores?
|
Organisms that eat non-living matter
e.g dead leaves, faeces or carcasses |
