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Q. The peppered moth provides a well-known example of natural selection. The light-coloured form of the moth was predominant in England before the industrial revolution. In the mid-nineteenth century, a dark-coloured form appeared. The difference is formed by a dominant allele of one gene. By about 1900, around 90 percent of the moths around industrial areas were dark coloured, whereas light-coloured moths were still abundant elsewhere. In fact, birds could readily find out the light moths against the soot-darkened background in industrial areas and therefore were eating more light moths. Recently, use of cleaner fuels has greatly reduced soot in the landscape, and dark-coloured moths have been disappearing. Should the two forms of moths be considered separate species?
Briefly explain why this mating produces a triploid individual. Why can mitosis proceed normally in triploid cells, but meiosis cannot.
What are the most probable genotypes of the male and female parents? Give details the strategy used to determine the genotypes. What is the probability of the subsequently offspring having a spotted brown tail.
What is hydrogenase? How can this enzyme be used as part of a strategy to "improve" a Rhizobial strain used to inoculate legumes? Describe logic and provide the appropriate diagram.
Apoptosis and the Hayflick limit and their relationship to cancer formation
How could you demonstrate experimentally that the selective antagonist binds the receptor specifically? Illustrate the experiment you would perform and also the controls you would contain.
What would be the expected frequencies of the homozygous dominant, heterozygous, and homozygous recessive after 100 generations.
What will the results be for each plant if light only in the 650 nm range is supplied? 500 nm range? 450 nm range? Put in plain words.What colour is each plant? Give details.
How do you describe the apparent contradictory finding of spontaneous pain and interference with pain perception in just about the same area.
The Neurospora cross was made between a strain that carried mating type A and the mutant allele arg-1(arg) and another strain the carried mating-type a and the wild type arg-1 (+)gene
What is the most common agent of UTIs . The pool regularly becomes infested with disease-causing viruses and bacteria. Which species are more possible to thrive in the changing environment.
With these anatomical features in mind, do research to discover an angiosperm species that has structural modifications to leaves, stems, roots, or flowers that result in adaptive functions. For in case, a California Barrel Cactus has spines in place..
Compute the change in energy of an atom that emits a photon of wavelength 2.21 meters. (Planck's constant is 6.626 x 10-34 joule seconds; the speed of light is 2.998 x 108 m/s)
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