A 3.1 SL Diversity of organism Flashcards
Who observed variation between species? And why is it important?
Charles Darwin observed that typical populations vary in many respects, and that this variation is an important factor for evolution. If all individuals in a population were identical, there would be no way of some individuals being favoured more than others.
What was originally the term species used for? And what did Carl Linneaeus discorver?
Originally biologists used the term “species” for a group of organisms with shared traits. Carl Linneaeus, a biologist working on classifying organism, described the outer form and inner structure of typical members of a species according to its morphology.
How did Carl Linneaeus classify plants?
Carl Linnaeus classified plants based on the number, arrangement and fusion of sexual parts. Or, grouping organisms according to the presence of shells would put snails & turtles in the same group….
What is the morphological species concept?
The morphological species concept describes species based on how they look (morphology). This is the traditional way of classification, but it can be very misleading for identifying species. Often two species look similar, but in reality they have evolved differently for a very long time.
Why do biologists group organisms?
Biologists group organisms to represent similarities and proposed relationships. Classification systems change with expanding knowledge about new and well-known organisms. The science of classification is referred to as taxonomy.
What is binomial system for naming organisms?
Categorising organism is easier if a universal and internationally accepted system for naming is used. This two-part name consists of the genus name and the species name.
What is smallest taxonomic group? And how do you incorporate it in the naming system?
How can you recognise subspecies?
three names
