I recommend "Evolution from Clones". The protagonist, Su Ze, transmigrated to a world in the era of evolution. He could evolve by absorbing the extract of a higher-level life form. Every time he absorbed the extract, he would also obtain a skill from the owner of the extract. If you like this kind of plot that absorbs the ability of animals to evolve, this novel is very suitable for you! I hope you like my recommendation, Mwah ~๐