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Bio 101 Exam 4

QuestionAnswer
What is extinction? When all of its members have died
What are the two types of reproductive barriers? Prezygotic and Postzygotic
What are examples of prezygotic barriers? Habitat isolation, temporal isolation, behavioral isolation, mechanical isolation, gametic isolation
What are examples of post zygotic barriers? Hybrid inviability, hybrid infertility, hybrid break
What is gradualism? Species evolved in small, incremental changes, slanted lines
What is punctuated equilibrium? Species evolved rapidly and have straight horizontal lines
What is sympatric speciation? Some populations diverge genetically even while living together
What is allopatric speciation? There is no contact between the 2 groups, with no gene transfer between the 2, their allele frequencies become more and more distinct
What are the 2 main causes of mass extinction? Impact theory/collision theory and shifting land masses
What do meteors do? They create dust, block sunlight, and plants and species die
On an evolution tree what does gradualism and punctuated equilibrium look like? Gradualism-small angles & Punctuated Equilibrium-horizontal lines
When is speciation likely to result? If 2 populations of a species live in separate habitats and they cannot interbreed
Created by: MOWGaming04
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