1 Behind them was a broad ring of stagnant water covered with duckweed .
2 Perhaps duckweed 's crowning glory could be as a valuable high-protein food.
3 Many of the craters half-filled with water already had duckweed growing.
4 The mouse, the yeast and the duckweed were, relatively speaking, very closely related.
5 They were just as closely related to the mouse, the yeast and the duckweed .
6 With such poor light, I couldn't see much: only a few strands of duckweed .
7 It can "see" and remove unwanted duckweed from cow pastures, boosting production.
8 She gathers the large duckweed , By the banks of the stream in the southern valley.
9 A muskrat swam through a layer of duckweed out to a clear slip of deeper water.
10 Among the species Woese and his colleague George Fox studied were a mouse, yeast and duckweed .
11 This brown and liquid cross was spotted by duckweed , which the swan displaced as he swam.
12 But duckweed is much more economic to grow.
13 Then he submerged his head and came up with a mouthful of dripping duckweed and water bistort.
14 The marshy pond was choked with duckweed that had to be piled in a cart and taken away.
15 Late dragonflies skim over the duckweed .
16 Except for the absence of white duckweed , it was the same scene, more than a thousand years later.
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