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Bella Nat 5

U3 KA 6 Evolution

QuestionAnswer
What is Natural Selection The survival of the organisms best ADAPTED to their surroundings. Best adapted survive and reproduce.
What is a SPECIES A group of organisms that look similar and can reproduce resulting in FERTILE offspring
Name 3 Isolating Mechanisms Geographical & Ecological & Behavioural Isolation
Give an example of Behavioural Isolation Different breeding seasons OR Different Courtship behaviour, different mating song
Give an example of Geographic Isolation Rivers OR Seas OR Mountains OR Deserts separating sub-populations
Give an example of Ecological Isolation Sub-populations live in different habitats within an ecosystem and don’t mix OR one sub-population is tolerant to an Abiotic factor the other sub-population can’t tolerate and so they do not mix
What is a Niche The role an organism plays within an Ecosystem
What process has led to Antibiotic resistance due to over prescription Natural Selection
What caused the Melanic form of the Peppered Moth to appear Mutation
What process makes it unlikely for the Melanic Peppered Moth to be found in the country side Natural Selection
What characteristic of Bacteria behaviour results in a high mutation rate High reproduction rate
What are the stages in speciation? Isolation-->Sub populations-->mutations in each sub-pop-->natural selection in each sub-pop-->different selective pressurs in each sub-pop--> reintroduce each sub-pop and infertile offspring =speciation
What is the only sourde of new alleles? Mutations
What environmental factors cause mutations Radiation and some Chemicals
Created by: nscobie
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