Biology

Gene flow is genes moving between two populations.

the transfer of genes from one gene pool to another

two populations transferring genes

1

Speciation Adaptive radiation refers to changes in a species in response to varying environmental conditions.

many new species form

The distribution of alleles changes due to random chance.

or

The allele frequency of a population changes due to a bottleneck effect. <apex>

Population bottlenecks

Reproductive isolation

Niche availability

Which of these organisms is considered the most complex?

Allopatric Speciation (geographic isolation) can lead to the formation of a new species because the population is split in two smaller populations by a physical barrier (river, canyon, mountain...).

Apex is Mergus serrator and Mergus merganser.