Oddly enough it doesnt specify whether EVERY species must be taken by Noah.. although it DOES include this list..
. 6.18 But I will establish my covenant with you; and you shall come into the ark, you, your sons, your wife, and your sons' wives with you. 6.19 And of every living thing of all flesh, you shall bring two of every sort into the ark, to keep them alive with you; they shall be male and female. 6.20 Of the birds according to their kinds, and of the animals according to their kinds, of every creeping thing of the ground according to its kind, two of every sort shall come in to you, to keep them alive. 6.21 Also take with you every sort of food that is eaten, and store it up; and it shall serve as food for you and for them."
I know others poo poo the idea of science trying to explain religeon... but based on current biomass on THIS planet... that would mean him bringing 400,000 species of beetle alone... just under a million beetles before he began "collecting" any other species....
BIG BOAT!