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Chapter 14
Speciation
Term | Definition |
---|---|
classify | to group |
mammary gland | a milk-producing structure on a mammal |
morphology | the study of differences in body forms of organisms |
biochemistry | chemistry that deals with the chemical compounds and processes in organisms |
fertile | capable of producing offspring |
reproductively isolated | a division between populations that once mated, but can no longer mate and produce fertile offspring |
interbreed | to breed together |
biological species concept | a principle that defines a species as populations that can interbreed and produce offspring |
asexual reproduction | reproduction that involves one parent and no egg or sperm |
ecological species concept | a principle that defines species as populations that can interbreed and produce offspring based on their niche |
niche | the way of life of a species |
subspecies | a division of a species |
allopatric speciation | when similar organisms do not interbreed due to physical barriers |
sympatric speciation | when similar organisms live nearby, but do not interbreed due to differences in behavior |
subpopulation | a division of a population |
genus | a group of similar species |
kingdom | a group of similar phyla or divisions |
phylum | a subdivision of the animal kingdom |
division | a subdivision of the plant kingdom |
three-domain system | a system that classifies all living things into three broad groups |
archaea | the domain of prokaryotic organisms that are not bacteria |
eukarya | the domain of eukaryotic organisms |
stasis | showing little change over time |
punctured equilibrium | a theory that states species stay the same for a long time, then new species evolve suddenly due to global changes and mass extinctions |
coordinated stasis | a pattern where most species appear at about the same time |
mass extinction | the dying out of large numbers of species in a short period of time |
community | a group of different populations that live in the same area |
co-adaptation | one species becoming dependent on another species |
instantaneous speciation | a new species formed in one to several generations |