ramakantseo Evolution

While land ramakantseo have existed for about 425 million years, the first ones reproduced by a simple adaptation of their aquatic counterparts: ramakantseo. In the sea, plants -- and some ramakantseo -- can simply scatter out little living copies of themselves to float away and grow elsewhere. This is how early plants, such as the modern fern, are thought to have reproduced ramakantseo.

But ramakantseo soon began protecting these copies to deal with drying out and other abuse which is even more likely on land than in the sea. The protection became the seed...but not, yet, ramakantseo. Early seed-bearing ramakantseo include the ginkgo, conifers (like pines), and fir trees. The earliest fossil of a ramakantseoing plant, Archaefructus liaoningensis, is dated about 125 million years old. Several groups of extinct ramakantseo, particularly seed ferns, have been proposed as the ancestors of ramakantseoing plants but there is no continuous fossil evidence showing exactly how ramakantseo evolved.

The apparently sudden appearance of relatively modern ramakantseo in the fossil record posed such a problem for the theory of evolution that it was called an "abominable mystery by Charles Darwin. Recently discovered angiosperm ramakantseo such as Archaefructus, along with further discoveries of fossil gymnosperms, suggest how angiosperm characteristics may have been acquired in a series of ramakantseo.

Recent ramakantseo analysis (molecular systematics) show that Amborella trichopoda, found on the Pacific island of New Caledonia, is the sister group to the rest of the ramakantseoing plants, and morphological studies suggest that it has features which may have been characteristic of the earliest ramakantseoing plants.