Essay Questions: I need help with the following questions! Please help! 1. Ch 22

Question

Essay Questions:

I need help with the following questions! Please help!

1. Ch 22.2 and 22.3: How do homologies support the concept of evolution? Include convergent evolution in your discussion.

2. Ch 22.2, 22.3: Discuss 2 different lines of evidence that support the theory of evolution.

3. Ch 22: Explain what it means to share a common ancestor. Argue the point that we do not come from Monkeys, but rather share a common ancestor.

4. Ch 23: Of all the mechanisms of evolution, natural selection is adaptive while the others are not. Explain.

5. Ch 23: How does sexual selection sometimes lead to sexual dimorphism?

6. Ch 23: Some organisms seem poorly designed: ostriches can’t fly, whales spend most of their life under water but they can’t breathe in water, etc. How do “poor designs” found in nature support the theory of evolution?

7. Ch. 24: Discuss two means of sexual isolation and how they arrest gene flow.

8. Ch 28: Briefly describe the life cycle of a fern. Include key points like gametophyte, diploid, etc. Include a diagram (s) to make your point clear. I don’t need good artistry—just clarity.

9. Ch 28: Compare and contrast a moss and a conifer or flowering plant. Both are plants and therefore similar, but they are also different. Be able to explain how each of the following supports the idea that species change through time: artificial selection; extinction; vestigial traits; antibiotic resistance.

Be able to explain how each of the following supports the idea that species change through time: artificial selection; extinction; vestigial traits; antibiotic resistance.

Explanation / Answer

1.

Evolution means that characters are built as a result of mutations that give the individuals of that type an advantageous edge. Homology is the similarity in found in the organisms at various level: anatomy (the arms of bat, dolphin, man; all have a similar pattern which means they had a common ancestor but the differences were as a result of natural selection in their respective habitats), molecular ( the similarity at genetic and protein levels establish the concept of common descent with modifications). Convergent evolution stands for the similarity in structures found despite the fact of the difference in the lineage of ancestry. This strengthens the argument of evolution that changes that are advantageous are selected by nature.

2. Evolution is supported by

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