Which of the following is a limit of science?
The technology or tools available to test scientific claims
The number of times an experiment can be repeated
The total number of scientists in a field, like physics or chemistry
The use of critical thinking and evidence to study phenomena

Aliquid is an answer i hope this

One answer could be erosion

How is it possible that phylogenies based on sequences from nuclear genomes and organellar genomes (i.e., chloroplasts and mitochondria) from the same group of species yield phylogenetic trees with different branching orders?   answer :   the genome of the endosymbiont is more closely related to members of the group in which it originally evolved, while the nuclear genome of the engulfing organism has its own evolutionary trajectory.