Welcome to the Q&A Forum

Absolutely - the authority the receive from being tied to the strong root domain and from the internal links they receive from the website allows pages to rank with no third party inbound backlinks. A lot of retail queries bring up pages ranking with only internal links - a query for [yellow dresses] in Google.co.uk has Debenhams ranking second. The site has no inbound links from other websites. You will see this over and over again - a competitor ranking lower for that query may take on a link development project to increase their page on yellow dresses' authority over the Debenhams page, and from experience I can tell you that that can be very profitable! However, in an environment where no SEO has taken place on these pages, the pages from the strongest domain will often rank very well with no deliberate effort.