AQA A2 Biol4 - Population

Question	Answer
Ecosystem	Self-contained unit made up of the biotic and abiotic factors in an area
Population	A group of individuals of the same species in a habitat
Community	The organisms of all species that live in the same area
Habitat	The place where an organism normally lives
Niche	All the conditions and resources required for an organism to survive and reproduce. (its 'role')
Random Sampling	Sampling a population to eliminate bias
Systematic Sampling	Regular sampling across an area
Mark-Release-Recapture	popn size= No. in first sample * No. in second sample ----------------------------------------------------- marked animals in second sample
Abiotic Factors	The non-living factors of an environment
Biotic Factors	The living factors of an environment
Interspecific Competition	Competition between organisms of different species
Intraspecific Competition	Competition between organisims of the same species

Resource summary

	Created by horsfalla over 10 years ago