Three investigators—Nusslein-Volhard, Wieschaus, and Lewis—won the Nobel Prize for physiology and medicine in 1995 for work they did in 1970 with Drosophila. Briefly describe their findings
What will be an ideal response?
They identified and characterized a number of maternal-effect and zygotic genes that control pattern formation in Drosophila.
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Where does glycolysis takes place?
A. mitochondrial matrix B. mitochondrial membrane C. mitochondrial inner membrane D. mitochondrial intermembrane space E. cytosol
How is the adaptation of investing more energy in producing large offspring beneficial in the Atlantic mollies?
A. Larger-sized offspring can avoid predation by other species. B. Larger-sized offspring have increased swimming ability for accessing food in toxic or dark conditions. C. Larger-sized offspring mature to reproductive age at a faster rate. D. Larger-sized offspring can migrate easier among the stressful and nonstressful environments. E. All of the answer choices are correct.
Why is Pacific salmon movement into freshwater streams considered migration if the salmon die at the head of the stream and never return to the ocean?
A) It is not considered migration but immigration. B) Migration is a one-way movement. C) Because their offspring return to the ocean, the entire population participates in the migratory event via different life stages. D) Most male adult fish survive reproduction and return to the ocean.
What is the hallmark of all horizontal gene transfers?
1) Transfer of DNA between organisms of the same generation 2) Transfer of DNA using a virus 3) The use of plasmids 4) Transfer of DNA from parent to offspring