Mitochondrial DNA sequences are often used to study a relationship between______ . a. different species b. individuals of the same species c. different taxa d. evolutionary structures e. homologous structures
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Mitochondrial DNA sequences are often used to study
a relationship between______ .
a. different species
b. individuals of the same species
c. different taxa
d. evolutionary structures
e. homologous structures
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- . DNA sequences in many human genes are very similar to thesequences of corresponding genes in chimpanzees. The mostlikely explanation for this result is that(A) humans and chimpanzees share a relatively recent common ancestor.(B) humans evolved from chimpanzees.(C) chimpanzees evolved from humans.(D) convergent evolution led to the DNA similarities.Why are human and chimpanzee DNA 96 percent similar? Please choose the best option.a) Both groups show similarities in their fossil record.b) Humans and chimpanzees share several similar traits such as the use of tools.c) These two species descended from a recent common ancestor.d) Natural selection has favored those particular genes in both humans and chimpanzees.The Neanderthal nuclear genome: A. Shows that Neanderthals inherited their ability to flake stone directly from Homo habilis. B. Is overwhelmingly similar to the modern human genome. C. Demonstrates once and for all that Neanderthals had language. D. Is composed exclusively of mitochondrial DNA. E. Indicates that most Neanderthal females died young, which explains why Neanderthal populations were so small.
- Why are humans so genetically similar within our species? A. Because humans evolved in multiple locations around the world at different times. B. Because humans evolved in one location (Africa) and we have existed as a species for very long time. C. Because humans evolved in one location (Africa) and we haven't existed as a species for very long. D. Humans are not very genetically similar to one another.Homologous genesa. are derived from the same ancestral gene.b. are likely to carry out the same or similar functions.c. have similar DNA sequences.d. exhibit all of the above features.If two different organisms are closely related evolutionarily, then they will (a) be similar in size. (b) share a recent common ancestor. (c) have very different DNA sequences in their genes. (d) be randomly located throughout the world.
- Why are humans so genetically similar within our species? A. Humans are not very genetically similar to one another. B. Because humans evolved in one location (Africa) and we have existed as a species for very long time. C. Because humans evolved in multiple locations around the world at different times. D. Because humans evolved in one location (Africa) and we haven't existed as a species for very long.Mitochondrial DNA evidence has shown that____. a. the greatest diversity of mtDNA is in European peoples, suggesting they share a more recent origin b. the least diversity of mtDNA is in African peoples, suggesting Old World peoples share a more ancient origin c. the greatest diversity of mtDNA is in African peoples, suggesting they share a more ancient origin d. the least diversity of mtDNA is in European peoples, suggesting they share a more ancient originOn a phylogenetic tree, the length of branches is a.) The comparison of homologous DNA and RNA sequences provided by Woese. b.) The separation of living organisms into three domains c.) The point in evolution when, based on scientific evidence, an ancestor is thought to have diverged to form two new species. d.) Proportional to the time elapsed since the split.
- When two organisms are very distantly related in an evolutionary sense, (a) they should have extremely similar embryonic development. (b) they must share a very recent common ancestor. (c) the sequences of DNA in their genes should be less similar (more different) than those of two more closely related organisms. (d) they should share more homologous traits than two more closely related organisms share.A. Explain which force of evolution is seen here by a hybrid bird landing on an island that is not its home and breeding with the indigenous population. B. Explain which force of evolution randomly chooses an individual from a larger gene pool to form a new, smaller population with less genetic variety.A researcher compares several species of maple tree by examining the amino acid sequence of a protein. The researcher discovers that the amino acid sequence differs in three locations depending on the species of tree. What can the researcher conclude based on this data? A. Maple trees are evolving rapidly. B. The different species have different morphological characteristics. C. The maple trees have been exposed to high levels of mutagens. D. The genetic makeup of the maple tree population has changed over time.