unit 3 Life on Earth Flashcards
What is a niche
The role an organism plays in its comunity
What is a habitat
the place where an organism lives
What is a community
All the living organisms that live in a habitat
What are exapmples of a-biotic factrors
non-living things - light intensity, soil PH, soil moisture, temperature
Biotic factors
living things - disease, food availability, predation, grazing
what is biodiversity
the variation of between all living organisms on earth
What is intraspecific competition
Competition between the same species for the same resources, often more intense than interspecific
What is interspecific
Competition between different species for the same resources
What is bioaccumulation
the build up of pesticides throughout the foodchain
What is a biological control
When you insert a natural preditor into a community
What do biological indicator species do
Show the conditions in an area
what are the 3 types of isolation barriers
Behavioural
Ecological
Geographical
What is the first stage of photosynthesis
Light reactions
Describe this stage
Light enters the leaf and breaks H2O into hydrogen and oxygen also producing ATP. The oxygen evaporates out the cell and the ATP and hydrogen are needed for the second stage.
What is the second stage called
Carbon fixation
