Plants that trap insects for food are called carnivorous plants. There are 550 species living in places from the high peaks of New Zealand to the swamps of Carolina. The butterwort gets its name because it leaves ooze drops that make it glisten like butter. These drops contain the plant's digestive juice. The sundew can tell the difference between flesh and other substances and only reacts to flesh. The sundew's leaves are covered in tentacles that ooze a sticky substance called mucilage. The sundew wraps up its victims in its tentacles and suffocates them in slime in under ten seconds. A Venus flytrap's trap will only shut if touched at least twice in 20 seconds.

    Insects are lured onto many carnivorous plants by sweet-tasting nectar or the smell of rotting meat. The juice of a pitcher plant will dissolve a chunk of steak to nothing in a few days. The bladders of bladderworts were thought to be air sacs to keep the plant afloat. In fact, they are tiny traps for water insects. Carnivorous plants live in places where they cannot obtain nitrogen from the soil.

“In fact, they are tiny traps for water insects. Carnivorous plants live in places where they cannot obtain nitrogen from the soil."

What can we infer from the sentences?