Carrying capacity is the property of ecosystem which indicates the number of individuals of population of species or group of species an ecosystem can sustain in terms of availability of resources (food, shelter). A population of herbivores is at it's carrying capacity for it's habitat. Immigration is the arrival of members of species to a new habitat for the purpose of deriving resources not found in their previous habitat or new habitat is more suitable then previous habitat. Immigration will increase the number of individuals in the ecosystem. Therefore, immigration will result in a sudden rise in a population that far exceeds the carrying capacity.
The two chromosomes in a homologous pair are very similar to one another and have the same size and shape. Most importantly, they carry the same type of genetic information: that is, they have the same genes in the same locations.
