Evidence for Evolution

Cards (9)

where are guppies native to?
south america
where do guppies live?
in freshwater streams and ponds
what kind of guppies do females prefer to mate with?
males with more spots
what happens to pools of guppies with large predatory fish?
they see less orange guppies compared to the overall population
why is there a trade off in male guppies?
males with more orange spots are more sexually successful, however they are also more at risk from predators so may not live long enough to pass on their genes and reproduce
who carried out experiments on guppies in artificial pools?
John Endler
what are homologous characteristics?
similar structures from a common ancestor
what are vestigial structures?
structures which are poorly developed in some organisms but fully developed and functional in others
what are homoplastic characteristics?
characteristics which are similar in appearance and function, but fundamentally different, suggesting separate evolutionary origins