The following points highlight the three main lines of evolution in angiosperms. Angiosperm: Evolution # 1. The First Line: I. It consists of Rhoeadales, Sarraceniales, Parietales, Malvales, Geraniales, Sapindales, Rhamnales and some Tubiferales. In this case the hypogynous condition remained unchanged. II. Labiatae is the most advanced family of this line. It is characterized by fusion of sepals, petals and [...]
The below mentioned article provides a summary on Views Regarding the Origin of Angiosperms. A fundamental problem that must be dealt with is whether the angiosperms are monophyletic (i.e. a group consisting of all descendants derived from a single ancestor) or polyphyletic (i.e. a group that does not have a common ancestor). Due to inadequate fossil records, the question of [...]
The below mentioned article provides a short notes on Geographic Information System (GIS). GIS or geographic information system combines layers of information about a place or area to give a better understanding of it. For a full GIS, one requires hardware (computers and peripherals), software, data and sound analysis methods for interpreting the results generated by the GIS. GIS may [...]