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Cell migration is a central process in the development and maintenance of multicellular organisms. Tissue formation during embryonic development , wound healing and immune responses all require the orchestrated movement of cells in particular directions to specific locations.
GCSE Bitesize was launched in January 1998, covering seven subjects. For each subject, a one- or two-hour long TV programme would be broadcast overnight in the BBC Learning Zone block, and supporting material was available in books and on the BBC website. At the time, only around 9% of UK households had access to the internet at home.
Wildebeest migrating in the Serengeti. Migration, in ecology, is the large-scale movement of members of a species to a different environment.Migration is a natural behavior and component of the life cycle of many species of mobile organisms, not limited to animals, though animal migration is the best known type.
The Incredible Human Journey is a five-episode, 300-minute, science documentary film presented by Alice Roberts, based on her book by the same name.The film was first broadcast on BBC television in May and June 2009 in the UK.
In population genetics, gene flow (also known as migration and allele flow) is the transfer of genetic material from one population to another. If the rate of gene flow is high enough, then two populations will have equivalent allele frequencies and therefore can be considered a single effective population.
Nature's Epic Journeys (also known as Nature's Great Migrations in international release, or Nature's Great Race on PBS release) is a 2016 British nature documentary series created and produced by the BBC and PBS, first shown in May 2016 at BBC One and BBC One HD. The series focus on three animals - Elephant, Caribou and Zebras - which uses ...
Mexican free-tailed bats on their long aerial migration. Animal migration is the relatively long-distance movement of individual animals, usually on a seasonal basis. It is the most common form of migration in ecology.
Studies show that the pre-modern migration of human populations begins with the movement of Homo erectus out of Africa across Eurasia about 1.75 million years ago. Homo sapiens appeared to have occupied all of Africa about 150,000 years ago; some members of this species moved out of Africa 70,000 years ago (or, according to more recent studies, as early as 125,000 years ago into Asia, [1] [2 ...