When scientists use molecular clocks to estimate the timing of evolutionary change, the assumption is that... Group of answer choices telomeres were not fixed the climate was constant throughout the lineage the organisms engaged in random sexual mixing genes in related species mutate at a fairly constant rate

Q: A consortium of dairy and beef farmers has hired you to study the evolutionary origins of domestic…

A: Evolution is a change in the heritable qualities of natural populaces over progressive ages. These…

Q: The hoof of a horse and the claw of a cat are found to both form due to the expression of the same…

A: When the organs in different species have different functions but they arise from the same genes,…

Q: DNA sequences from randomly chosen individuals from the two populations are shown here – A1…

A: Genetic variation is how much the genotype of an organism differs from other organisms. The genotype…

Q: in 2000, the human genome was triumphantly released as a reference genome with approximately 8%…

A: Epigenetics: The study of how cells regulate gene activity without modifying the DNA sequence is…

Q: Question: Until recently, the Basque people of Europe were thought to have descended directly from…

A: DNA Deoxyribonucleic nucleic acid It is defined as molecule which is composed of two polynucleotide…

Q: In the late 1800s, the saltation hypothesis (hopeful monster hypothesis) was proposed as a way to…

A: In the late 1800s, the saltation hypothesis (hopeful monster hypothesis) was proposed as a way to…

Q: Describe the modern theory of evolution and discuss how it is supported by evidence from two of the…

A: Evolution is defined as the change in the genetic composition of a population during successive…

Q: Which of the following statements best explains the importance of sister taxa for understanding the…

A: When two organisms originating from a common ancestor and placed close to each other they form a…

Q: One of the key ingredients of evolution by natural selection is variation. Within a population,…

A: Introduction :- In biology, variation refers to any difference between cells, individuals, or groups…

Q: .1. Phylogenetic tree: Change in characteristics occurs in lineages over time. Rate of mutation is…

A: INTRODUCTION Neighbor Joining Method This is a clustering method used for building phylogenetic…

Q: What is the difference between a neutral and an adaptive evolutionary process? Describe two or more…

A: Evolution: Evolution is a systemic process that is happening step by step manner to select an…

Q: group of people have already been chosen to go on the first manned space flight to Mars.  Describe…

A: EVolution is a series of changes that occur over several generations and relies on the processes of…

Q: Which of the following best explains why coalescent-based phylogenetic inference is important in the…

A: Need to find which one of the following is true from the following options related to…

Q: Which of the following statements is false regarding lateralgene transfer?(a) It accelerates…

A: Lateral or horizontal gene transfer, is a process by which an organism transfers its genetic…

Q: In addition to evolution through vertical descent, evolutionary changes can also occur by horizontal…

A: The propagation of DNA among various genomes is known as horizontal gene transfer or lateral gene…

Q: Gene families arise in the human genome are thought to have risen from   A. duplication followed…

A: Gene families are a cluster of genes that arose from the common ancestral globin gene. There are…

Q: Which statement about genome evolution is false?     Mutations at the ends of introns are less…

A: Evolution is change in the heritable characteristics

Q: There are two hypotheses to explain the pattern of Human Evolution: 1) Progressive Evolution of a…

A: Since we are so complicated, no one field can truly "understand" us. So, let's examine some of the…

Q: 1. Which organisms in the cladogram in figure 1 have fur and mammary glands? 2. Which organisms in…

A: There are few important points that are as follows : We know that the evolutionary relationship of…

Q: 1) What is the source of modifications that contribute to the variety of offspring produced by…

A: “Since you have asked multiple question, we will solve the first question for you. If you want any…

Q: Approximately 98% of the information in human DNA is shared by chimpanzee DNA. This is evidence of…

A: Molecular evidence for evolution determines the genetic similarity between the species and proves…

Q: Recall from our classes on molecular evolution that some proteins evolve more rapidly than others.…

A: The option is shown below.

Q: The challenge in using sequence data to estimate the evolutionary tree for all living things is to…

A: To find evolutionary relationship in between different species we need to sequence and study their…

Q: Imagine that you have the DNA sequences from the intron of a gene in three species called A, B, and…

A: DNA and RNA both made by unbranched linear polymer of nucleotides but..

Q: Some people think that many of our uniquely human traits arose by sexual selection. Over thousands…

A: Sexual selection is a kind of natural selection in which either males or females choose their…

Q: Imagine that you have the DNA sequences from the intron of a gene in three species called A, B, and…

A: DNA and RNA both made by unbranched linear polymer of nucleotides but

Q: An isolated population of prairie dogs has longer than average teeth. As a result, they can eat more…

A: Introduction A mutation is a change in a DNA sequence. Mutations can result from DNA copying…

Q: The genome size of humans and chimpanzees are both approximately 3 billion base pairs, sharing about…

A: It is the process whereby an organism better adapts to their environment tend to survive and produce…

Q: The Amish community in Eastern Pennsylvania stemmed from a small closed population of around 200…

A: The bottleneck effect is an evolutionary phenomenon where a population reduces significantly to a…

Q: How did Spiegelman et al.' s experiments in 1967 & 1970 on the origins of natural selection provide…

A: The RNA World hypothesis would be confirmed if experimental evidence indicated that a completely…

Q: In general, how does contemporary evolutionary theory account for the evolution of complex…

A: Evolution is a process through which cumulative changes occur at the genetic level in the…

Q: As we go back in time, the number of our direct ancestors' increases but the number of humans who…

A: Coalescence: it is used in evolutionary biology to determine the distribution of gene divergence.

Q: Describe the modern theory of evolution and discuss how it is supported by evidence from two of the…

A: Dear student, We are authorized to answer one question at a time since you have not mentioned which…

Q: Wyckoff et al. (2000. Nature 403:304-309) have proposed that some human male…

A: According to the evolutionary theory of natural selection, evolutionary changes occurs through…

Q: Some fish in a murky underground lake have lighter scales than the others. this makes it slightly…

A: Natural events can sometimes work in such a way that a particular morphotype of a species may find…

Q: You want to make a phylogenetic tree of a group of three related species of lizards that live on an…

A: Evolution is any alteration in the "heritable characteristics" of the population. These…

Q: 1. (a) inferred phylogeny of a set of DNA sequences     Molecular phylogenetics     Molecular…

A: Molecular phylogenetics - It is the branch of phylogeny in which comparative analysis of genetic…

Q: Molecular marker is used to determine relatedness of species which may directly or indirectly exerts…

A: The core concept of molecular biology is the investigation of three processes: replication,…

Q: , which two species would you expect to be more closely related? Organism No.1 with ATG CAA TAC GCC,…

A: The correct option is - c.Organims No 1 and No.3 are likely more closely related

Q: DNA sequences in many human genes are very similar to the sequences of corresponding genes in…

A: Convergent evolution In convergent evolution unrelated species develop similar character as they…

Q: You are studying the evolution of species. After performing DNA analysis, he discovers a gene that…

A: DNA analysis It is also called DNA profiling. This is a process that is used to determine the…

Q: Your descendants have fortunately inherited your fascination with rodent genetics. Fifty thousand…

A: The given DNA sequences from randomly chosen individuals from the two populations are : A1   ATAAGA…

Q: Crickets have colonized each island in the Hawaiian Archipelago. Geological data indicates that…

A: The long history of the island means there would be a more complex volcanic activity which makes…

Q: In which of the following situations would you expect to probably see differences in the speed of…

A: Molecular Clock Hypothesis: This hypothesis was originally formulated by Emile Zuckerkandl and Linus…

Q: Match the terms to their descriptors. NOTE: If you want to change your selection, you'll need to…

A: Two species evolve in different directions from a common starting divergent evolution Two…

Q: Humans carry a variety of non-functional genetic sequences, called processed pseudogenes, in their…

A: Pseudogenes are non-functional genes that used to be functional one and they lack introns and has a…

Q: Evolutionary theory predicts that species are related, not independent. Four of the following…

A: The end of the Cretaceous period which was about 65 million years ago, was the most prominent of all…

Evolutionary lineages

An evolutionary lineage is a series of populations of organisms that descend from a common ancestor. Each species in the lineage is the direct consequence of evolutionary change from a common ancestor. A phylogenetic tree is generally used to display lineages visually. Lineages are components of the phylogenetic tree of life. Molecular systematics procedures are widely used to predict lineages.