What is species? Flashcards
What is a the morphological species model
a species definition based solely on the appearance of the organism observed
What is sexual dismorpshim
differences between the appearance of the male and female of a species
What is the ACTUAL definition of species
a group of organisms with similar characteristics that interbreed to produce fertile offspring
what is one limitation of of the definition of “species”
all of the organisms in a species cannot attempt to interbreed to produce fertile offspring bc they do not live in the same area
what is the BETTER version of the deinftion of species
group of organisms with similar characteristics that area all potentially capable of breeding to produce fertile offspring
what is molecular phylogeny
the analysis of the genetic material of organism to establish their evolutionary relationships
what is the ecological species model
species definition based on the ecological niche occupied by an organism
What is the mate recongntion species model
a species based on unique fertilisation systems including mating behaviour
What is the gentic species model
species model based on DNA evidence
what is the evolutionary species model
species model based on shared evolution between groups of organisms
What is the limitation of the species model 1/4
Finding new evidence- many species have never been observed mating
What is the limitation of the species model 2/4
Plants often interbreed with different species to produce fertile hybrids
What is the limitation of the species model 3/4
many organsims do not reproduce sexually
What is the limitation of the species model 4/4
Fossil organisms cannot reproduce most have accessible DNA but they still need to be classifed
Why is the ecological model not that good
niche definitions vary and many species occupy more than one niche
