The Biosc.xyz site hosts a search engine that is QIP-based. While the QIP search engine is a legitimate Russian service, the Biosc.xyz iteration of it is a dodgy imitation. Luckily, using the Biosc.xyz search engine does not pose a threat to the security of your computer or your data.
If the Biosc.xyz site has been set up as your default new tab page, it is likely that you have installed a PUP (Potentially Unwanted Program) on your computer. The Biosc.xyz website is likely promoted via dubious Web browser extensions that would tamper with users' settings behind their back. This is done so that the Biosc.xyz site would generate more traffic and, therefore, more revenue. Unfortunately, you are not likely to get the most relevant results for your search queries if you use the Biosc.xyz site. This is because this search engine will likely place sponsored content as top search results.
If you are viewing the Biosc.xyz Web page every time you open a new tab, it would be best to scan your system with a legitimate anti-virus application. The security tool will help you locate and remove any PUPs that may have infiltrated your computer.