deep biosphere
... that genetic diversity in the deep biosphere is at least as great as it is on the surface?
... that <a href="./Genetic_diversity" id="mwCTo" rel="mw:WikiLink" title="Genetic diversity">genetic diversity</a> in the <b id="mwCTs"><a href="./Deep_biosphere" id="mwCTw" rel="mw:WikiLink" title="Deep biosphere">deep biosphere</a></b> is at least as great as it is on the surface?