Chapter 16 Vocabulary

Chapter 16 Vocabulary - prevents organisms of two different...

Info iconThis preview shows pages 1–2. Sign up to view the full content.

View Full Document Right Arrow Icon
Biology 1421 Chapter 16 Key Terms Adaptive Radiation: the rise of many new species in a relatively short time as a result of a single species that invades different habitats and evolves under different roomental pressures in those habitats. Allopatric Speciation: speciation that occurs when two populations are separated by a physical barrier that prevents gene flow between them (geographical location.) Extinction: the death of all members of a species. Isolating Mechanism: a morphological, physiological, behavioral, or ecological difference that prevents members of two species from interbreeding. Polyploidy: having more than two homologous chromosomes of each type. Postmating Isolating Mechanism: any structure, physiological function, or developmental abnormality that prevents organisms of two different populations, once mating has occurred, from producing vigorous, fertile offspring. Premating Isolating Mechanism: any structure, physiological function, or behavior that
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Background image of page 2
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: prevents organisms of two different populations from exchanging gametes. Reproductive Isolation: the failure of organisms of one population to breed successfully with members of another; may be due to premating or postmating isolation mechanisms. Speciation: the process of species formation, in which a single species splits into two or more species. Species: the basic unit of taxonomic classification, consisting of a population or series of populations of closely related and similar organisms, a species can be defined as a population or series of populations of organisms that interbreed freely with one another under natural conditions but that do not interbreed with members of other species. Biology 1421 Chapter 16 Key Terms Sympatric Speciation: speciation that occurs in populations that are not physically divided ; normally due to ecological isolation or chromosomal aberrations (such as polyploidy)....
View Full Document

Page1 / 2

Chapter 16 Vocabulary - prevents organisms of two different...

This preview shows document pages 1 - 2. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online