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5 Written questions

5 Matching questions

  1. Natural selection
  2. example of directional selection
  3. Allopatric speciation
  4. purines
  5. Founders effect
  1. a spatial isolation creates barrier, something divides a population into two or more subpopulations usually a physical barrier like creation of mountain range or river.
  2. b ag
  3. c large cliff swallows survived because they had more fat stores in a cold snap so the large allele became dominant for survival. might not be fixed though
  4. d an average difference between the survival/ reproduction of individuals with certain phenotypes relative to individuals with other phenotypes. only mechanism that can produce adaptation
  5. e a change in allele frequencies occurring due to genetic drift when a new population is established from a small sample of the original population called a founder event

5 Multiple choice questions

  1. natural selection was not able to optomize all aspects of a trait, due to genetic correlation or lack of genetic variability
  2. one base deletion result in the deletion of a base causing all the other bases to shift and make their codons code for different amino acids.
  3. precision is the absence of vaugeness and ambiguity. Accuracy is how close observations or predictions are to the empirical truth.
  4. tc
  5. a trait in a fossil species that is intermediate between those of younger and older species.

5 True/False questions

  1. paleozoic550-250 million years ago means anchient era most phla appeared and diversity was booming, major events were the first arthapods land plants fish animals with jaws tetrapods and reptiles ended by permian extinction


  2. five concepts of the modern synthesisa comprehensive theory of evolution that incorporates genetics and includes most of Darwin's ideas, focusing on populations as the fundamental units of evolution.


  3. heterozygous advantagea type of selection where organisms that are heterozygous have an advantage over homozygous this allows for genetic variation to remain in a population.


  4. Mutationa group of individuals in the same species living in the same geographic species


  5. Directional selectionit increases the amount of variation in a trait individuals with the average trait have a low fitness and the extremes have a higher fitness this is how speciation occurs the two extremes can go in different directions resulting in speciation. An example is the black bellied seed crackers who either had very short or very long beak if they lived long enough to survive so by maiting with the group similar to you you increased the ofsprings survival to the point where eventually there would be two species of long beaked and short beaked