11. What is the theory of fixed species? Explain why fossils represented a problem for this...

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Biology

11. What is the theory of fixed species? Explain why fossilsrepresented a problem for this theory. Briefly state why the theoryof fixed species predominated for such a long period ofhistory.
12. Describe Lamarckâ€™s explanation for the evolution of species.Were his hypotheses eventually supported or rejected? Explain howhis observations played a role in the study of evolution.
13. What are Darwinâ€™s major contributions to the theory ofevolution?
14. Explain how the fossil record and homologous structures areevidence for evolution.
15. Which of the following is evidence for common ancestry:analogous or homologous structures? What are some examples ofeach?
16. Explain how phylogenetic/evolutionary trees are created andwhat they represent. Know how to interpret them! What do the branchpoints represent?
17. Define natural selection. Make sure to address how mutationscontribute to it. Then give some examples.
18. Define a population. Compare that to a community andecosystem. What do each of these categories include?
19. Describe genetic drift. How is this different fromselection? Does it usually occur in small or large populations?
20. Distinguish between the following concepts: a. thebottleneck effect and the founder effect b. directional selection,disruptive selection, and stabilizing selection c. artificialselection and natural selection.

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1 Fixed species The species which does not change or does not give rise to any diveersee species are called fixeed species The fossils which are found are generally diverse catagory and there are variation of single specieseven many fossils also evident that one species arise from another like the archaeopteryxSo the fossils does not support this theory The species are generally tend to be diverse which means that they give rise to other species so the fixed species are not applicable in the history 12 According to the Lamarks theory of evolution an organism can skip on to its offspring physical characteristics that the determine organism obtained through use or disuse in the course of its lifetime This concept is also known as the inheritance of obtained traits or smooth inheritance The therory of Lamark or the Neo Lamarkism was supported by many scientiest of the worldwhile some weere also against this theory According to this observation the acquired characters are transfered to the next generationbut at that time he was unable to how the See Answer

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