Speciation Flashcards
the process by which one species splits into two or more species
speciation
What does speciation do?
bridges microevolution & macroevolution
change in allele frequency in population over time
microevolution
broad patterns of evolutionary change above the species level
macroevolution
a group of population whose members can interbreed and produce fertile, viable offspring
species
What does the biological species concept believe?
(1) gene flow holds populations together genetically
(2) reproductive isolation keeps species apart
(3) phenotypic similarities or differences don’t matter
when biological barriers impede 2 species from producing viable, fertile offspring
reproductive isolation
Types of reproductive isolation
pre-zygotic barriers & post-zygotic barriers
offspring of crosses between different species
hybrids
blocks fertilization by hindering mating or fertilization
pre-zygotic barriers
5 types of pre-zygotic barriers
(1) habitat isolation
(2) temporal isolation
(3) behavioral isolation
(4) mechanical isolation
(5) gametic isolation
Which type of pre-zygotic isolation deals with water versus land?
habitat
Which type of pre-zygotic isolation includes mating in the summer versus winter?
temporal
Which type of pre-zygotic isolation includes knowing mating rituals?
behavioral
Which type of pre-zygotic isolation is where the organisms are physically inhibited from mating?
mechanism