Venus flytrap has evolved from other carnivorous plants. After a DNA analysis
performed by Ken Cameron of the University of Wisconsin, it has been confirmed
that Venus flytrap and waterwheel plant are related. This means Venus flytrap,
a snap-trap plant, has evolved from sticky-trap plants. The sticky-trap plants
must have at first started adapting by moving its tentacles and leaves to
increase the chance of sticking a passing insect. Next it sped up how quickly
it detected the prey and responded. Then, it must have become selective so it
only traps live insects. Finally,
it must have evolved its tentacles into sensory hairs and teeth that detect and
wrap around the insects, and also losing its sticky glands and growing new
digestive glands capable of digesting the insects. This is all so that the
plant can get more nutrients by capturing bigger insects.
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