Conclusions: Protein Similarities e last row in Figure 18.12 tells you that the

Question

Conclusions: Protein Similarities e last row in Figure 18.12 tells you that the test serum in well 3 is from a human. How do your test results confirm this? . Th . Aside from humans, the test sera (supposedly) came from a pig, a monkey, an orangutan, and a chimpanzee Which is more closely related to humans the pig or the chimpanzee? Judging by the amount of precipitate, complete the last row in Figure 18.12 by indicating which serum you believe came from which animal. On what do you base your conclusions? . In section 18. 2, a comparison of bones in vertebrate forelimbs showed that vertebrates share a common ancestor. Molecular evidence shows us that of the vertebrates studied. and common ancestor. Humans share a more recent common ancestor with chimpanzees t with pigs are most closely related. In evolution, closely related organisms share a recent han they do Laboratory Review 18 1. What has occurred when a group of bacteria becomes resistant to a specific antibiotic? 2. In addition to comparative anatomy and molecular evidence, what shows that all organisms are related to one another? 3. What era of geologic time are we in currently? 4. During what period of geologic time did the coal-forming forests flou 5. During what era of geologic time did the first cells evolve? 6. How many significant mass extinctions have occurred over time? 7. What do most fossils consist of beca use these parts are not consumed or decomposed over time? 8. For which group of organisms-invertebrates, vertebrates, or plants-is the fossil record not as good as that for the other two? 9. What term describes parts of organisms that exhibit similar basic structures and embryonic origins? 10. In addition to a postanal tail and a dorsal nerve cord, what structures are observed in vertebrate embryos? 11. Do the skulls of chimpanzees or humans have a sagittal crest? 12. What hominid genus flourished 2.8 MYA? 13. The amino acid sequence of what electron carrier protein has been determined for a variety of organisms? 14. Are two species closely or distantly related if the antibodies to the antigens of one species form very little precipitate when mixed with the antigens of the other species? Laboratory 18 Human Evolution 261 18-17

Explanation / Answer

Ans-1 when a bacteria become resistant to some antibiotics then the bacteria loose it's senstivity to that specific antibiotics and that antibiotics have no role in controlling that bacteria.

Ans-2 the factor other than anatomy and molecular evidence which tells us about relatedness of various species is the physiology of the organisms. The working of the body of different organisms show various similarities which can be used to correlate them.

Ans-3 currently we are living in the cenazoic era of the geological time period.

Ans-4 during carboniferous periods of late paleozoic era the coal forest were flourished.

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