It’s an uncontroversial fact that organisms have changed (or evolved) during the history of the life of Earth that even the Watchtower has agreed on to, albeit in a roundabout way, IDK sa kanila, magulo sila. Kaya pala litung-lito ako kanina nung tinatry ko basahin yung mga posts.
Species are not the same as ‘kinds’, there may have been only a few hundred ‘kinds’ in the ark with Noah and that would have been enough for the survivors of the flood to repopulate the earth because over time there is this process by which the ‘kinds’ diversified into species. And they didn’t elaborate further than that, they just say, obviously these ‘kinds’ became the millions of species we know of today.
Insight on the Scriptures, Vol. 1, is incredibly vague on how many representative ‘kinds’ boarded the ark to repopulate the planet. A number of only a few hundred is put forward that ‘could have produced the variety of species known today.’ Other creationists like Ken Ham are more generous, suggesting that 7,000 kinds accomplished this feat. Even if we take this larger figure, to suggest that 7,000 ‘kinds’ ballooned into 6.5million land-dwelling species in only 4,400 years requires an intensity and speed of natural selection that would baffle scientists. We would see, on average, approximately 1,500 new species evolving every year.
There’s a huge contradiction here because bear in mind that Jehova’s Witnesses seem to believe that Evolution is false teaching. If you check w13 10/15 p.7-8 that says
It’s a false teaching apparently and yet if you literally take the account of Noah, you have to believe that there’s only a ‘few hundred kinds’ or if we’re being generous, 7,000 ‘kinds’ ballooned into 6.5million land-dwelling species at a rate that scientists do not support in terms of the speed of evolution.
TLDR;
"...there are a few basic 'kinds' that emerged from the ark and spread out over the surface of the earth,
eventually producing many variations of their 'kinds'. Although many new variations have come into existence since the Flood, the surviving 'kinds' have remained fixed and unchanged..."
So basically, the Bible says that there is evolution, that it happened, but they (The Watchtower) wouldn't call that process as 'evolution', they'd call it 'variation', and it also appears they have a different connotation for the word 'kind/s'.