Which process of evolution does not change the total number of species?ExtinctionNonbranching evolutionBranching evolutionAll change the number of species

To determine which process of evolution does not change the total number of species, we can analyze the different types of evolution mentioned in the question.

1. Extinction: This process leads to the death of a species, thereby decreasing the total number of species.

2. Nonbranching Evolution: This refers to a scenario where a species evolves into a new species without branching off, meaning the original species may still exist or it may evolve directly into another form, thus not increasing the overall count of species.

3. Branching Evolution: This process involves one species splitting into two or more species, thereby increasing the total number of species.

4. All Change the Number of Species: This option implies every process mentioned will affect species count, which is incorrect as nonbranching evolution does not add to the number of species.

Based on this analysis:

Final Answer

Nonbranching evolution does not change the total number of species.