Chapter 4

The main topic in chapter 4 is speciation. The chapter defines speciation, provides examples for its possible causes and results, and also goes over sexual selection and its advantages. The chapter ends with a few pages about hybrids. I thought this chapter was pretty funny; the picture of the avenue bower bird actually made me laugh out loud. This was mostly review for me, but it's still entertaining.I don't really have any questions about this chapter.