It is here impossible to say whether the whole arrangements indicated were made at once in obedience to the Divine Design, or were produced gradually.
It has been suggested that uniformity of climate and temperature continued up till the carboniferous ages, at any rate; and it is only in the later ages that such differences of fauna in different parts of the world appear, as to show differences of climate more like what we have at present.
Whether this is so or not, I am not concerned to argue. The narrative tells us that God did, at a certain point in his Creative work, design and ordain the necessary arrangements; and physical science may find out, when it is able, how and when the adjustments spoken of came about.
(5) AND GOD SAID—
(i.) Let the waters bring forth the moving creature that hath life,
(ii.) Let fowl fly above the earth on the face of the expanse.
As to (i.) the "creation" consisted of—great sea-monsters (or water monsters), and every living thing that moveth.
Then the animal life received a blessing. Animals, even the lowliest, are capable of a new feature in life—happiness in their being, which cannot be predicated of plants.
(6) AND GOD SAID—
(i.) Let the earth bring forth the living creature after its kind ...