Question

The background passage states, "DNA and protein comparisons provide molecular evidence that organisms with similar sequences share a more recent common ancestor" which indicates recent shared ancestors because mutations accumulate over time. The background passage also expresses how fossil records reveal the history of the types of organisms that have lived on Earth, which helps to reveal the different stages of evolution in which different animals have had. Also, homologous structures provide evidence of organisms having similar bone structures with the same purpose, just different measurements. ​

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Explain how these independent lines of evidence converge to support the conclusion of common ancestry.​ in 2 sentences 9th grade language

Answer 1

Comparing DNA and proteins shows that organisms with more similar sequences are more closely related, fossils record which forms lived when and how bodies changed over time, and homologous structures (like similar bone layouts) show the same basic body plan modified for different jobs. Because these three independent kinds of evidence all point to the same patterns and order of change, they support the conclusion that different species descended from common ancestors.