Ecosystem & Niches Ecosystems Species?do not exist by themselves in their own isolated environment, they interact with other species forming?communities These communities interact with each oth...
Viruses Viruses are?microorganisms?that can only be seen using an electron microscope They have no cellular structure (and so are?acellular?and?no metabolism Viruses?hijack the DNA replication mach...
Kingdoms The domain Eukarya can be divided into 4 kingdoms: Protoctista Fungi Plantae Animalia Organisms from each of the four kingdoms have?distinct?characteristics?and features, but share similar...
Eukarya The hierarchical classification system of organisms in biology is used to organise and?group similar organisms together?so that they can be more easily understood There are several taxonomi...
The Three Domains: Archaea, Bacteria & Eukarya Taxonomy is the practice of biological classification It involves placing organisms into a series of categories or taxa By grouping organisms into...
Definitions of Species Scientists have been classifying organisms into species for hundreds of years, in order to investigate the diversity of life that exists today and in the past There is diffic...
Allopatric & Sympatric Speciation Evolution?causes?speciation: the formation of?new species?from pre-existing species over time, as a result of?changes to gene pools?from generation to generati...
Theory of Evolution A species can be defined as a group of organisms that are able to?interbreed?and?produce fertile offspring Members of one species are reproductively isolated from members of ano...
Examples of Selective Breeding Selective breeding (or artificial selection) is the process by which?humans choose?individuals with?desired traits?to reproduce, with the aim of producing offspring w...
