ch24 - Chapter 24 Speciation Speciation the origin of a new...

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

View Full Document Right Arrow Icon
Chapter 24: Speciation Speciation: the origin of a new species Evolutionary theory must also explain macroevolution , the origin of new taxonomic groups Biological species : Population (or group of populations) whose members have the potential to interbreed in nature and produce viable, fertile offspring Reproductive Barriers: Prevent interbreeding between different species Biological and/or geographical barriers Biological barriers: 1) Pre-zygotic: impedes mating or Hinders fertilization if mating is attempted 2) Post-zygotic: prevent the hybrid zygotes from developing into viable, fertile adults Pre-zygotic barrier : 1a) Habitat isolation : 2 species live in the same area but different habitat Encounter each other rarely, never Technically no geographically isolated 1b) Behavioral Isolation: Species-specific signals and elaborate behaviors to attract mates Ex. Bird songs, firefly lightning patterns 1c) Temporal isolation : 2 species breed at different times of day, seasons, years
Background image of page 1

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

View Full Document Right Arrow Icon
Image of page 2
This is the end of the preview. Sign up to access the rest of the document.

{[ snackBarMessage ]}

Page1 / 3

ch24 - Chapter 24 Speciation Speciation the origin of a new...

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