worm burrow造句

• During the day, the worms burrow into the turf and the layer of thatch.
• The worm burrows deep during summer droughts and is able to conserve water in its nephridia.
• These worms burrow into plant roots, and intercept nutrients moving up to the plants stems and leaves.
• This building allows tourists to crawl through a magnified replica of a worm burrow and a simulated worm's stomach.
• Bivalves, molluscs and other trace fossils of worm burrows are often found within the Basal Shell Bed, along with several different species of gastropods.
• Until recently, no fossil traces of multicelled animals, with muscles, guts or other distinctive anatomical features, had been found in rocks more than 540 million years old, but in the last few years a few discoveries _ including some of worm burrows _ have pushed back the first appearance of complex animals to about 580 million years.