Bonobo.

Chimpanzee and Bonobo.

Bonobo and Gorilla.

Chimpanzee and Gorilla.

Chimpanzee.

Gorilla.

Single celled prokaryotes.

Single celled eukaryotes.

Multicellular eukaryotes. 

Sponge-like animals.

Starting at 100%, after 704 million years 50% will be left, after another 704 million years nothing will be left.

Starting at 100%, after 704 million years 50% will be left, after another 704 million years 25% would be left.

Starting at 100%, after 5730 years 50% will be left, after another 5730 years nothing will be left.

Starting at 100%, after 5730 years 50% will be left, after another 5730 years 25% would be left.

This DNA is only inherited from the mother.

No genetic recombination occurs for this type of DNA.

This DNA is incredibly small and circular, sized at only ~17,000 bp.

There are many copies of this DNA in each cell.

...on a molecular base tree using molecular evidence.

...on a morphological base tree using molecular evidence.

...on a molecular base tree using morphological evidence.

...on a morphological base tree using morphological  evidence.

has not occurred as there has not been enough time since our separation from the human common ancestor.

will no longer occur due to our medical advancements.

can be seen in the adaption of short stocky bodies of indigenous peoples in cold regions.

means there are currently multiple species of human.

Mechanical incompatibility.

Genetic incompatibility.

Gametic isolation.

Behavioural isolation.

Biological species concept

Ecological species concept

Morphospecies concept

Epigenetic species concept

Intersexual

Directional

Disruptive

Stabilising

Sympatric speciation via disruptive selection

Allopatric speciation via dispersal

Allopatric speciation via vicariance

Peripatric speciation via dispersal

Sympatric speciation via hybridisation