Biology 1201A Chapter Notes - Chapter 19: Tristan Da Cunha, Species Problem, Heterosis
15 Jul 2015
School
Department
Course
Professor
Document Summary
1: humans use names (signals) to distinguish b/w different categories of objects, definition of species depends upon organisms to which it is applied. 19. 2 definition of species: fundamental taxonomic units of biological classification, biological species concept: species as group of organisms that can successfully interbreed & produce fertile offspring. Androdioecy (andro-male, dioecy=male, female)- > species: functional males & hermaphodites, no true females. 2: individuals of diff. species do not resemble one another b/x they share fewer genetic characteristics, morphological species concept: individual of species share measurable traits that distinguish them from individuals of other species. 19. 4 gene flow: four examples: how ecology, habitat availability, behaviour can affect distribution patterns & genetic differences, restricted distributions: ex. lichens,eco whereas humans=everywhere, geographic distribution: ex. Balea pervusa (snail): species closely related taxa occurring from. Tristan de cunha: behaviour: use of electrophoretic gels; ex. mouse (captive vs wild, forest availability; ex. b/w scotland & england affects red squirrels.
