The average numbers of offspring produced by three genotypes are: A1A1=6, A1A2=3, A2A2=2, What will be the selection coefficient of theses allele?

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#Question id: 12095

#Unit 10. Ecological Principles

It is now thought that the atmosphere of the primitive Earth was composed largely of carbon dioxide, nitrogen, and water vapor. The composition of certain iron-containing minerals suggests that the carbon dioxide began to be replaced by oxygen about 2 billion years ago.   Which of the following is the best explanation for the change in atmospheric composition?

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#Question id: 415

#Unit 1. Molecules and their Interaction Relevant to Biology

Which one of the following compounds does not have a large negative free energy of hydrolysis?

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#Question id: 4313

#Unit 3. Fundamental Processes

Which of the following statements best describes the characteristics of siRNA?

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#Question id: 2434

#Unit 2. Cellular Organization

The contractile ring

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#Question id: 7179

#Unit 5. Developmental Biology

Blocking BMP(BMP2, BMP4, BMP7) signaling by infecting progress zone cells with retroviruses carrying dominant negative BMP receptors. Which of the following results are found?