Speciation
Biology ⇒ Evolution and Diversity
Speciation starts at 9 and continues till grade 12.
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See sample questions for grade 9
A population of insects is split by a new river, and over time, the two groups become different species. What type of speciation is this?
Describe how natural selection can contribute to speciation.
Describe the difference between prezygotic and postzygotic barriers.
Describe what is meant by 'hybrid breakdown'.
Describe what is meant by 'hybrid inviability'.
Explain how geographic isolation can lead to the formation of new species.
Explain how polyploidy can lead to speciation in plants.
Explain why gene flow between populations can prevent speciation.
Explain why hybrid sterility prevents gene flow between species.
Explain why reproductive isolation is important for speciation.
Name one example of a prezygotic barrier that can lead to speciation.
What is speciation?
A population of frogs lives in a large forest. Over many generations, some frogs begin to breed only at night while others breed only during the day. Eventually, these two groups can no longer interbreed. What type of reproductive isolation has occurred, and how could this lead to speciation?
A scientist observes that two populations of beetles living on opposite sides of a wide valley have developed different coloration and mating behaviors. After several generations, they can no longer produce fertile offspring together. Which process most likely led to the formation of these new species?
Describe one way in which human activities can influence the process of speciation in wild populations.
Explain how the founder effect can lead to the formation of a new species.
