Population refers to all the organisms of a particular species that occupy an ecosystem.
Community
Refers to all the populations in an ecosystem
Habitat
The place within an ecosystem where an organism lives and to which it has adapted
Ecosystem
A community of organisms interacting with each other and their environments in a particular area
Main events of carbon cycle
Carbon dioxide fixed to plant carbohydrate - plant carbohydrate to animal carbohydrate - living organisms release carbon dioxide - decay of organisms release carbon dioxide - combustion of fossil fuels release carbon dioxide
Main events of nitrogen cycle
Nitrogen gas converted to usable form - Plant protein to animal protein - Decomposition releases N compounds - Ammonium to nitrite - Nitrites to nitrates - Nitrates to plant protein - Nitrogen compounds to nitrogen gas
Incomplete dominance
Neither allele is dominant or recessive with respect to the other.
Law of segregation
Inherited characteristics are controlled by pairs of factors (alleles). These factors separate from each other at gamete formation, with only one member of each pair found in each gamete.
Law of independant assortment
When gametes are formed, each member of a pair of alleles may combine randomly with either of another pair of alleles.
