Which stratum should contain the greatest proportion of extinct organisms?

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#Question id: 21129

#Unit 12. Applied Biology

Yeast fermentation are used for  glycerol production by___

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#Question id: 23686

#Unit 13. Methods in Biology

Bacteria containing recombinant plasmids are often identified by which process?

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#Question id: 1187

#Unit 4. Cell Communication and Cell Signaling

Which protein stabilizes an intermediate in the Ras GTP hydrolysis reactions?

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#Question id: 17995

#Unit 8. Inheritance Biology

Consider a heritable autosomal disease with an incidence in the population of 1 per thousand. On average, individuals with the disease have 80% as many children as the population average. In answering the various parts of this question, assume that mating is random. What mutation rate would be required to maintain the observed incidence of the disease in the population if the disease is recessive?

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#Question id: 8718

#Unit 9. Diversity of Life Forms

Which of the following would, if it had acted upon a gene, prevent this gene from acting as a reliable molecular clock?