Ch.25 - SpeciationSee all chapters
All Chapters
Ch.1 - Introduction to Biology
Ch.2 - Chemistry
Ch.3 - Water
Ch.4 - Carbon
Ch.5 - Biological Molecules
Ch.6 - Cells
Ch.7 - The Membrane
Ch.8 - Energy and Metabolism
Ch.9 - Respiration
Ch.10 - Photosynthesis
Ch.11 - Cell Signaling
Ch.12 - Cell Division
Ch.13 - Meiosis
Ch.14 - Mendelian Genetics
Ch.15 - Chromosomal Theory of Inheritance
Ch.16 - DNA Synthesis
Ch.17 - Gene Expression
Ch.18 - Regulation of Expression
Ch.19 - Viruses
Ch.20 - Biotechnology
Ch.21 - Genomics
Ch.22 - Development
Ch.23 - Evolution by Natural Selection
Ch.24 - Evolution of Populations
Ch.25 - Speciation
Ch.26 - History of Life on Earth
Ch.27 - Phylogeny
Ch.28 - Prokaryotes
Ch.29 - Protists
Ch.30 - Plants
Ch.31 - Fungi
Ch.32 - Overview of Animals
Ch.33 - Invertebrates
Ch.34 - Vertebrates
Ch.35 - Plant Anatomy
Ch.36 - Vascular Plant Transport
Ch.37 - Soil
Ch.38 - Plant Reproduction
Ch.39 - Plant Sensation and Response
Ch.40 - Animal Form and Function
Ch.41 - Digestive System
Ch.42 - Circulatory System
Ch.43 - Immune System
Ch.44 - Osmoregulation and Excretion
Ch.45 - Endocrine System
Ch.46 - Animal Reproduction
Ch.47 - Nervous System
Ch.48 - Sensory Systems
Ch.49 - Muscle Systems
Ch.50 - Ecology
Ch.51 - Animal Behavior
Ch.52 - Population Ecology
Ch.53 - Community Ecology
Ch.54 - Ecosystems
Ch.55 - Conservation Biology

Concept #1: Biological Species

Concept #2: Allopatric Speciation

Concept #3: Sympatric Speciation and Hybrid Zones

Additional Problems
____________ speciation is controversial because the effects of _______________ may prevent the population from splitting in two.a. Allopatric, natural selectionb. Allopatric, genetic driftc. Allopatric, gene flowd. Sympatric, natural selectione. Sympatric, gene flow
One problem with the biological species concept is thata. it can’t be applied to organisms without sexual reproductionb. it can’t be applied to species that don’t evolvec. organisms that appear identical can be reproductively isolatedd. development has nothing to do with speciation 
Which of the following is an example of a pre-zygotic isolating mechanisma. hybrid sterilityb. hybrid inviabiltyc. gametic isolationd. hybrid breakdowne. fusion
Which of the following is an example of something that could lead to allopatric speciation?a. colonization of an islandb. sexual selectionc. allopolyploidyd. autopolyploidye. disruptive selection
The biological species concept states that species evolve toa. become morphologically differentb. have separate evolutionary pathwaysc. have separate ecological rolesd. become reproductively isolatede. become the same
What type of evolutionary event typically follows a mass extinctiona. sympatric speciationb. adaptive radiationc. hybrid infertilityd. stabilizing selectione. hybrid zones
Many insects have a “lock and key” type of genitalia in which the male reproductive structures will only fit into the reproductive structures of females of the same species so that even very similar species will not be able to mate with one another. What would expect to see if you investigated the details of fertilization in one of these species?a. species specific recognition proteins on the egg and a fast block to polyspermyb. species specific recognition proteins on the egg and no fast block to polyspermyc. no species specific recognition proteins on the egg and a fast block to polyspermyd. no species specific recognition proteins on the egg and no fast block to polyspermye. asexual reproduction
A species of bird in the forest have specialized beaks for pecking through nuts and eating them. The birds with the larger beaks are able to crack open the bigger nuts and the birds with the smaller beaks are able to crack open the small nuts, but the birds with the medium beaks can't pick through the small nuts or crack the big nuts and are eventually eliminated due to natural selection. The two extremes in beak sizes are selected for causing the big birds to grow bigger with bigger beaks and the small birds to become smaller with smaller beaks. Their genome becomes different that they can no longer interbreed. What type of speciation is this an example of?a. peripatric speciationb. parapatric speciationc. allopatric speciationd. sympatric speciation 
The ostrich and the emu look very similar and live in similar habitats, however they are not very closely related. This is an example of _______.a. sympatric speciation.b. divergent evolution.c. convergent evolution.d. adaptive radiation.
Name three different "Groups" of organisms that are considered eukaryotic microorganisms?
What is the difference between allopatric speciation and dispersive speciation?
Describe the similarities and differences between the terms allopatric speciation, parapatric speciation and sympatric speciation.
Describe the Biological Species concept, Morphospecies concept, and Phylogenetic species concept.
Describe an example (real or hypothetical) that illustrates allopatric speciation. How does gene flow between populations affect the chances of speciation? Explain why sympatric speciation is less likely to occur than allopatric speciation.
In many species, both prezygotic and postzygotic barriers can cause reproductive isolation. Which of the following best describes how behavioral isolation can prevent two species from interbreeding?A. Members of two species compete for the same territory and the same mates.B. One species mates only in the winter, while the other species mates only in the fall.C. The two species have different mating rituals that only attract mates within their own species.D. When the two species produce offspring, the offspring do not survive to reach sexual maturity.
What are the main characteristics that differentiate and unite Bacteria (Eubacteria), Archaea, Protists and Fungi. 
Discuss in some detail three prezygotic barriers preventing two separate species from producing offspring.
Which of the following would most likely cause sympatric speciation?A. geographic isolationB. hybrid fusionC. physical barriersD. sexual selection