What is a mutation?
What will be an ideal response?
A mutation is defined as any charitable change in the DNA sequence.
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Which one of the following statements about Pax6 and eye development is incorrect?
A. Binding of Pax6 protein to the cisregulatory elements of its target genes results in activation of some genes and repression of others. B. The specific program of eye development for a given species depends on the genes downstream of Pax6 in that species' genome. C. In the fruit fly, the total number of genes downstream of Pax6 that are needed for eye development is approximately 2000. D. Some of the genes influenced by Pax6 protein are activated or repressed indirectly by other transcription factors "turned on" by Pax6. E. The downstream target genes for Pax6 protein in different organisms are all very similar.
Shewanella spp. show great metabolic flexibility and can use a variety of electron acceptors, including ________.
A. chromium and tellurite B. technetium and neptunium C. uranium and plutonium D. iodate and selnite
Among the fungi, which feature is uniquely present in the chytrids?
A. Polysaccharide capsule B. Pellicle C. Cell wall composed of mannans D. Flagella
A symbiotic association between a fungus and a green alga or a cyanobacterium is called a
A. protist. B. mycorrhiza. C. mushroom. D. kelp. E. lichen.