HideShow resource information
View mindmap
    • A species is a group of similar organisms that can interbreed and produce fertile offspring
      • Difficult to use this concept with organisms that do not produce sexually
    • All organisms have DNA RNA and proteins, these have similar molecular structures where the organisms are related
    • The phylogenetic species concept - a group of organisms that have similar morphology, physiology, embryology and behaviour and occupy the same ecological niche
    • Any group of organisms with similar haplotypes more than another group are called clades
    • A monophyletic group is one that includes an ancestral organism and all its descendant species
    • A paraphyletic group includes the most recent ancestor, but not all its decendants
      • It is a monophyletic group with one or more clades excluded, for example grouping reptiles excludes birds which are decendants of reptiles


No comments have yet been made

Similar Biology resources:

See all Biology resources »See all DNA, genetics and evolution resources »