Biology

Gene flow is genes moving between two populations.

the transfer of genes from one gene pool to another

two populations transferring genes

may be is the living organism

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

Amoeba

sponges

The island finches have more gene flow

If the birth rate is higher than the death rate, the population increases. If the death rate is higher than the birth rate, the population decreases.

PCR

Lizards evolved after earthworms.

Apex is Mergus serrator and Mergus merganser.