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The potato arrived in Europe via the “Columbian Exchange.” Explain.
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- Is the soil around Iqaluit, Nunavut is good for agriculture (growing crops like wheat, vegetables, or raising animals)?1. Why was the great oxygenation event important for mitochondrial development? a) In your own words, define symbiotic. 2. Chloroplasts and mitochondria both contain a circular DNA chromosome, and ribosomes. Why does this evidence support the theory of endosymbiosis as the mechanism for the origin of eukaryotic cells? a) Today, could mitochondria live independently of their eukaryotic cell host? Give two pieces of evidence to support your answer.Q1) How Bt cotton confers resistance to Lepidopteran insect pests? Q2) Define gold rice? Why golden rice is important in Asia?
- A. What variety of banana do you eat today? B. What variety did your grandparents eat? C. What disease caused the demise of the first commercial banana? D. Why is the banana so susceptible to this disease?Which regions of the world have the highest lactose tolerance? Which have the lowest? Where would you expect to find evidence of early cultures using animal milk as a food source? Why is lactose tolerance much higher in some groups and extremely low in others?Biofuels offer an attractive alternative to fuel, but there are concerns about the resources and logistics of producing mass amounts of corn. Which organism is being considered as an alternative source of biofuel? A) cyanobacteria B) Escherichia coli C) yeast D) algae
- Why is nitrogen fixation so energetically costly?What would the results of Pasteur's swan-neck flask experiment have looked like if they supported the theory of spontaneous generation? B. What did Pasteur's experiments not prove? C. How would the presence of endospores in Louis Pasteur's nutrient solutions have affected his conclusions about spontaneous generation?Perform an internet search on “GoTaq Green Master Mix”. What are ingredients of the GoTaq Green Master Mix? What is the purpose of each ingredient?
- Why is nitrogen important to living things? What type of organism is responsible for making nitrogen available to plants?Trace the route of the nutrients NH,", NO, and PO,² carried by river runoff to a seagrass ecosystem. Indicate the specific process involved (e.g., nitrification, denitrification, etc.) and the chemical form (e.g., NH,", NO,", etc) at each step of transformation. Write your (short) answers in the numbered blanks below each illustration.In New York, farmers typically have a 3 year crop rotation of corn – soybeans – green manure. A) explain one reason crop rotation is important in farming B) explain what green manure is and why a grower would use it as part of their rotation schedule