MMSC 490 practice quiz 1- Correctly Solved
MMSC 490 practice quiz 1- Correctly Solved At the time life arose on Earth, Earth's atmosphere contained abundant amounts of all of the following except - Answer ️️ -O2 (H2, N2, and H2s were all present) RNA is believed to have been the initial genetic system because it can - Answer ️️ -catalyze the polymerization of nucleotides into another RNA strand. Mitochondria and chloroplasts resemble bacteria in that they - Answer ️️ -- have their own DNA - have their own ribosomes - reproduce by simple division into two In fluorescence microscopy, the immediate source of the light detected is light that has been .......... the sample. - Answer ️️ -emitted by Studies on which model experimental organism led to the initial discovery of important mechanisms controlling the development of the animal body plan? - Answer ️️ -Drosophila melanogaster The method by which cell components are separated by centrifugation at progressively higher speeds is called .......... centrifugation. - Answer ️️ -differential
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