Homework Answers
Molecular clock evolutionist uses to investigate the rate of mutation of bio-molecules through evolution in different groups. By this method we can see the relationship among different phyla and also the evolution trend. Most primitive organisms are bacteria and eukaryotes evolved from prokaryotes. Human belongs to class mammalia and spiders belong to arthropods, lamprey belongs to chordates whereas earthworms are invertebrate (phylum Annelids) and salamanders are amphibians, they evolved from fishes and sea urchin belong to Echinodermata, evolved from phylum Mollusca. So, first three options are incorrect.
Sponges belong to phylum porifera and jellies belong to phylum Cnidaria (Coelentrata) and cnidarians are evolved from Poriferans, so highest similarity can be observed in this group as compared to rest of the groups. So, the correct option is "Sponges-jellies"
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Assuming a molecular clock, which of the following pairs of animal species likely have the most...
All of the features below are features that characterize humans, though very few of them are...
All of the features below are features that characterize humans,
though very few of them are unique to humans. Rather, most of them
are present in our species because of our evolutionary history
(they were present in an ancestral species at some point in time,
and eventually passed on to us). For example, the bilateral
symmetry that characterizes the human body plan is a feature that
evolved in a primitive animal species that lived hundreds of
millions of years ago;...
Humans and Chimps share a 9,826 nucleotides out of 10,000 in sequences. Therefore, the Human and...
Humans and Chimps share a 9,826 nucleotides out of 10,000 in
sequences. Therefore, the Human and Chimp nucleotide difference out
of 10,000 is 174. Gorillas and my new species differ by only 165
nucleotides. A) K=(-3/4)In(1-(4(0.0174)/3))=0.0176050171.
L=K/2t=0.0176050171/2(6600000)=1.33x10^-9. B)
K=(-3/4)In(1-(4(0.0165)/3))=0.0166842067. t=K/2L=0.0166842067. That
is 6.2x10^6 years ago. By using the molecular clock method to
estimate the two species, we can say that the species most likely
diverged nearly 6 million years ago. C) I am uncertain what to
write here but I...
Genetics Worksheet Week 3: Gene Regulation and Epigenetics 1. Duchenne muscular dystrophy is caused by a mutation in a gene that is 2.5 million nucleotides in length and encodes a protein called dyst...
Genetics Worksheet Week 3: Gene Regulation and Epigenetics 1. Duchenne muscular dystrophy is caused by a mutation in a gene that is 2.5 million nucleotides in length and encodes a protein called dystrophin. The dystrophin protein itself is 3684 amino acids in length. Calculate below the approximate size of the mRNA that encodes dystrophin. Approximately what percentage of the gene that encodes dystrophin is intron sequence? The human genome encodes a much greater variety and number of proteins than the...
Genes in eukaryotes are often organized into exons and intrans, which require splicing to produce an...
Genes in eukaryotes are often organized into exons and intrans, which require splicing to produce an mRNA that can be translated. The gene organization is the order of the DNA segments that comprise the gene starting with the promoter, the first exon, the first intron, the second exon, and so on. The interspersed intrans can make gene identification difficult in eukaryotesparticularly in higher eukaryotes with many introns and alternative spliced mRNAs. Prediction of many genes and their organization has been...
Which of the following mutations would be most likely to have a harmful effect on an...
Which of the following mutations would be most likely to have a harmful effect on an organism? (A) a deletion of three nucleotides near the middle of a gene (B) a single nucleotide deletion in the middle of an intron (C) a single nucleotide deletion near the end of the coding sequence (D) a single nucleotide insertion downstream of, and close to, the start of the coding sequence In this problem, why (c) cannot be the answer?? Single nucleotide deletion...
11. Which of the following pairs are mismatched in arthropods? A. compound eyes-vision B. olfactory receptors-smell...
11. Which of the following pairs are mismatched in arthropods? A. compound eyes-vision B. olfactory receptors-smell antennae - touch & sense environment tube feet-locomotion 12· The distinction between protostomes and deutensames is based on differences in their A. digestive tracts B. nervous systems C. circulatory systenss E. eye spots 13. Most mollusks have a A. jointed appendages B. suckers used in for feeding. C. radula D. tube feet E. teeth 14. Which of the following pairs are mismatched in mollusks,...
6. Which of the following mutations would most likely have the severest consequences: Explain your reasoning....
6. Which of the following mutations would most likely have the severest consequences: Explain your reasoning. a. A change in amino acid recognition of an aminoacyl-tRNA synthetase b. A frame shift mutation at the end of the coding sequence of a gene A mutation at a splice junction C.
Question 1 1 pts Which of the following is true? Viruses cannot evolve because they are...
Question 1 1 pts Which of the following is true? Viruses cannot evolve because they are not technically alive; they cannot replicate on their own When viruses hijack a host's cells to replicate, mistakes made in the copying of their DNA or RNA can generate a huge number of genetic variants in the virus population A mutation in the molecules involved in binding to a host cell that allows binding to a new host species will not affect the virus's...
answer all please In which location are you most likely to find organic remains that have...
answer all please
In which location are you most likely to find organic remains that have not decomposed? • • • • A. Glacier B. Tropical sea C. A cave pond D. Temperate forest Horses evolved teeth with a cement covering and evolved from multiple toes to a single hoof because: . . • . A. their diet changed from plants and meat, to just plants. B. they became hunted by humans and evolved advantages to run faster. C. their...
Which of the following statements regarding the Hardy-Weinberg Equation is TRUE? Answers: It can only be u...
Which of the following statements regarding the Hardy-Weinberg Equation is TRUE? Answers: It can only be used when allele and genotype frequencies remain constant across generations in a population It can only be used when allele and genotype frequencies change across generations in a population It has no assumptions It mathematically shows how recessive alleles in a population decrease over time It reveals when allele frequencies change over time in a population Assuming Hardy-Weinberg Equilibrium, what percentage of individuals in...
All of the features below are features that characterize humans,
though very few of them are unique to humans. Rather, most of them
are present in our species because of our evolutionary history
(they were present in an ancestral species at some point in time,
and eventually passed on to us). For example, the bilateral
symmetry that characterizes the human body plan is a feature that
evolved in a primitive animal species that lived hundreds of
millions of years ago;...
Humans and Chimps share a 9,826 nucleotides out of 10,000 in
sequences. Therefore, the Human and Chimp nucleotide difference out
of 10,000 is 174. Gorillas and my new species differ by only 165
nucleotides. A) K=(-3/4)In(1-(4(0.0174)/3))=0.0176050171.
L=K/2t=0.0176050171/2(6600000)=1.33x10^-9. B)
K=(-3/4)In(1-(4(0.0165)/3))=0.0166842067. t=K/2L=0.0166842067. That
is 6.2x10^6 years ago. By using the molecular clock method to
estimate the two species, we can say that the species most likely
diverged nearly 6 million years ago. C) I am uncertain what to
write here but I...
Genetics Worksheet Week 3: Gene Regulation and Epigenetics 1. Duchenne muscular dystrophy is caused by a mutation in a gene that is 2.5 million nucleotides in length and encodes a protein called dystrophin. The dystrophin protein itself is 3684 amino acids in length. Calculate below the approximate size of the mRNA that encodes dystrophin. Approximately what percentage of the gene that encodes dystrophin is intron sequence? The human genome encodes a much greater variety and number of proteins than the...
11. Which of the following pairs are mismatched in arthropods? A. compound eyes-vision B. olfactory receptors-smell antennae - touch & sense environment tube feet-locomotion 12· The distinction between protostomes and deutensames is based on differences in their A. digestive tracts B. nervous systems C. circulatory systenss E. eye spots 13. Most mollusks have a A. jointed appendages B. suckers used in for feeding. C. radula D. tube feet E. teeth 14. Which of the following pairs are mismatched in mollusks,...
6. Which of the following mutations would most likely have the severest consequences: Explain your reasoning. a. A change in amino acid recognition of an aminoacyl-tRNA synthetase b. A frame shift mutation at the end of the coding sequence of a gene A mutation at a splice junction C.
Question 1 1 pts Which of the following is true? Viruses cannot evolve because they are not technically alive; they cannot replicate on their own When viruses hijack a host's cells to replicate, mistakes made in the copying of their DNA or RNA can generate a huge number of genetic variants in the virus population A mutation in the molecules involved in binding to a host cell that allows binding to a new host species will not affect the virus's...
answer all please
In which location are you most likely to find organic remains that have not decomposed? • • • • A. Glacier B. Tropical sea C. A cave pond D. Temperate forest Horses evolved teeth with a cement covering and evolved from multiple toes to a single hoof because: . . • . A. their diet changed from plants and meat, to just plants. B. they became hunted by humans and evolved advantages to run faster. C. their...
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