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Concept Of Species
Beginning of essay
Over the last few decades the Biological Species Concept (BSC) has become
predominately the dominant species definition used. This concept defines a
species as a reproductive community.
This though has had much refinement through the years. The earliest
precursor to the concept is in Du Rietz (1930 ....
Middle of essay
....(Skelton).
It cant be applied to species that reproduce asexually ( e.g Bdelloid
rotifers,eugelenoid flagellates ).Asexual forms of normally sexual
organisms are also known. Prokaryotes are also left out by the concept
because sexuality as defined in the eukaryotes is unknown.
The Biological species concept is also questionable in those land plants
that primarily self-pollinate.(Cronquist 1988).
Practically the BSC has its limitations in the most obvious form of
fossils.-It cant be applied t.... |
| Number of words: 1248 |
Approximate pages: 5 |
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