NATURAL SELECTION & EVOLUTION (1) Flashcards
morphological series concept
defines species as groups of individuals that are morphologically similar to one another and are morphologically distant from other such groups
biological series concept
defines a species taxon as a group of organisms that can successfully interbreed and produce fertile offspring
phylogenetic series concept
concept of a species as an irreducible group whose members are descended from a common ancestor and who all possess a combination of certain defining, or derived, traits
speciation
how a new kind of plant or animal species is created
allopatric speciation
occurs when a species separates into two separate groups which are isolated from one another
sympatric speciation
occurs when there are no physical barriers preventing any members of a species from mating with another, and all members are in close proximity to one another
chronospecies
a species derived from a sequential development pattern that involves continual and uniform changes from an extinct ancestral form on an evolutionary scale