wo students are working on an “Evidence for Evolution” lab for their biology class. As the two are working on completing some of the post-lab questions, they start to get into a conversation about the different forms of evidence. Student A claims that the fossil record is the most reliable form of evidence while Student B claims that comparative anatomy/morphology is the most reliable. Consider the two students’ claims and select which student, if either, is correct in their argument.

A: Student B is correct because the most accurate way we can tell that organisms are related are by looking at present day structures and their similarities and differences from each other. The more organisms that scientists can compare in the modern day, gives explicit information about structures of the past.

B: Neither student is correct. The most reliable form of evidence for evolution is embryology. Since all plants and animals are made of cells, the cells that are present at the first stages of development contain the most information about all organisms pasts.

C: Neither student is correct. The most reliable form of evidence for evolution is genetic comparison. At the genomic level, scientists are able to better understand how variation leads to evolutionary change and adaptation.

D: Student A is correct because the fossil record is permanent and cannot change. So, as scientists discover more fossils, these structures fill in all of the gaps of the evolutionary timeline.

Question

02-02-2024
Biology

contestada

wo students are working on an “Evidence for Evolution” lab for their biology class. As the two are working on completing some of the post-lab questions, they start to get into a conversation about the different forms of evidence. Student A claims that the fossil record is the most reliable form of evidence while Student B claims that comparative anatomy/morphology is the most reliable. Consider the two students’ claims and select which student, if either, is correct in their argument.

A: Student B is correct because the most accurate way we can tell that organisms are related are by looking at present day structures and their similarities and differences from each other. The more organisms that scientists can compare in the modern day, gives explicit information about structures of the past.

B: Neither student is correct. The most reliable form of evidence for evolution is embryology. Since all plants and animals are made of cells, the cells that are present at the first stages of development contain the most information about all organisms pasts.

C: Neither student is correct. The most reliable form of evidence for evolution is genetic comparison. At the genomic level, scientists are able to better understand how variation leads to evolutionary change and adaptation.

D: Student A is correct because the fossil record is permanent and cannot change. So, as scientists discover more fossils, these structures fill in all of the gaps of the evolutionary timeline.

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Answer:

C: Neither student is correct. The most reliable form of evidence for evolution is genetic comparison. At the genomic level, scientists are able to better understand how variation leads to evolutionary change and adaptation.

While each form of evidence mentioned (fossil record, comparative anatomy/morphology, embryology, and genetic comparison) contributes to our understanding of evolution, genetic comparison is considered one of the most reliable forms. Genetic comparisons, particularly at the molecular level, provide detailed information about the similarities and differences in the DNA sequences of different species. This genetic information allows scientists to trace evolutionary relationships, identify common ancestry, and understand the mechanisms of evolutionary change.

The fossil record is valuable but can be incomplete and subject to gaps. Comparative anatomy/morphology provides insights into structural similarities and differences, but convergent evolution and other factors can complicate interpretations. Embryology is informative, but it should be considered alongside other forms of evidence.