Which of the following is not a reason we become shorter as we age?
What will be an ideal response?
As a person ages, scoliosis may develop resulting in an abnormal spinal curvature and shorter stature.
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Mitochondria have an unusual characteristic for organelles that make them very useful in genetic studies. This characteristic is ________.
A. mitochondria contain their own DNA B. mitochondria are only found in females C. mitochondria produce a lot of ATP D. mitochondria have an unusual membrane
Which of the following statements best describes RNAi techniques for gene silencing?
A) siRNAs block DNA replication. B) siRNAs inhibit transcription of a gene. C) siRNAs inhibit mRNA splicing. D) siRNAs trigger degradation of mRNAs to prevent their translation. E) siRNAs prevent transport of mRNA from the nucleus to the cytoplasm.
Legionnaires' disease can be diagnosed by
A. the microbe's characteristic growth on common laboratory media. B. the microbe's staining properties under the microscope. C. fluorescent antibody tests. D. the clinical symptoms in infected patients. E. the microbe's sensitivity to all antimicrobial agents.
Very rapid speciation occurred when cichlid fishes were isolated in Lake Victoria. Widespread extinction was dramatically seen when
A. hybridization stopped. B. predatory fish were added. C. fishing was prohibited. D. artificial selection stopped. E. insect larvae stocks were depleted.