The WTS 'explanation', from the Creation book:
*** ce chap. 3 pp. 34-36 pars. 29-32 What Does Genesis Say? ***
29 Chapter 2 of Genesis apparently adds some details. However, it is not, as some have concluded, another account of creation in conflict with that of chapter 1. It just takes up at a point in the third “day,” after dry land appeared but before land plants were created, adding details that were pertinent to the arrival of humans—Adam the living soul, his garden home, Eden, and the woman Eve, his wife.—Genesis 2:5-9, 15-18, 21, 22.
30 The foregoing is presented to help us understand what Genesis says. And this quite realistic account indicates that the creative process continued throughout a period of, not just 144 hours (6 × 24), but over many millenniums of time.
How Did Genesis Know?
31 Many find it hard to accept this creation account. They contend that it is drawn from the creation myths of ancient peoples, primarily those from ancient Babylon. However, as one recent Bible dictionary noted: “No myth has yet been found which explicitly refers to the creation of the universe” and the myths “are marked by polytheism and the struggles of deities for supremacy in marked contrast to the Heb[rew] monotheism of [Genesis] 1-2.”3 Regarding Babylonian creation legends, the trustees of the British Museum stated: “The fundamental conceptions of the Babylonian and Hebrew accounts are essentially different.”4
32 From what we have considered, the Genesis creation account emerges as a scientifically sound document. It reveals the larger categories of plants and animals, with their many varieties, reproducing only “according to their kinds.” The fossil record provides confirmation of this. In fact, it indicates that each “kind” appeared suddenly, with no true transitional forms linking it with any previous “kind,” as required by the evolution theory.
Don't you just wonder how some of us ever believed this stuff? Brainwashing at its best!