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Some evolutionary biologists have argued that the neutral theory should be taken as the null hypothesis to explain genetic variation within species or populations and genetic differences among them. In this view, adaptation and natural selection should be the preferred explanation only if genetic drift cannot explain the data. Others might argue that since there is so much evidence that natural selection has shaped species' characteristics, selection should be the explanation of choice and that the burden of proof should fall on advocates of the neutral theory. Why might one of these points of view be more convincing than the other?
Create a model that would permit the attenuation region to no longer be involved in binding ribosomes and synthesizing leader peptides after the attenuation decision is made.
Once stabilized the patient was moved to the private room and the doctors ordered reverse isolation. What is reverse isolation and why is it required for this patient.
The big majority of the frogs in this population are green. A few individual frogs carry a mutation that prevents the production of the green pigment.
Explain the what happen from a physiological standpoint to the respiratory system when smoke is inhaled and exhaled.
Compound with amino groupConsider two small, identical, organic molecules in the cytoplasm of a cell, one with a hydroxyl group (-OH) and the other with an amino group (-NH2).
suppose a single gene controls soybean seed color and that you already know the nucleotide sequence of the wild type allele.
Assume if neurons are exposed to a chemical agent that prevents the NA + channels from opening, what would happen to the neuron? What would happen if the K + channels were inhibited?
When mendel crossed yellow-seeded and green-seeded pea plants, all of offspring were yellow seeded. As he took these yellow-seeded plants and crossed then with green- seeded plants what genotypic ratio is expected.
You are a scientist working on a large protein (500 amino acids long) you have genetically engineered the protein in in such a way as to replace a single hydrophobic amino acid with a negatively charged amino acid.give the difference between prima..
Write down a detailed lab report on Separation and detection of proteins. Your report must include Title, Introduction, Materials and methods and three references for this report.
A gerbil poplulation has one hundred light blue gerbiles, 250 dark blue gerbils, and 150 black gerbils. In one generation 10 percent of the home population is displaced by a gang of tough light blue gerbils.
Is this an instance of a positive or negative feedback mechanisms? What is the initial stimulus? What is the result.
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