Question

	Which one of the following is NOT a way that humans increased the carrying capacity of agricultural land during the 'green revolution.' Question 1 options: Increased use of irrigation to supply water. Adding inorganic fertilizer to the land to supply limited nutrients. Use of pesticides to control natural predators of crops. Increasing the genetic diversity of crop plants to help them withstand environmental change. This approach to determining safety minimizes the chances of releasing a dangerous product but may inhibit innovation and advancement of technology. Question 2 options: Absolute safety approach Innocent until proven guilty approach Precautionary principle Artificial selection Which of the following statements apply to BOTH genetic engineering and artificial selection of agricultural plants? Choose ALL that apply. Question 3 options: Has allowed humans to increase the yield that can be produced in a given area of cropland. Has introduced genetic sequences into crop DNA that did not arise through random mutations. Has contributed to the lack of genetic variety in the world's agricultural crops. Interbreeding of crops produced in this manner with wild relatives can reduce the biodiversity of those wild populations. Which one of the following is the best explanation of how insects can become resistant to a pesticide? Question 4 options: When humans use pesticides, it causes mutations in teh genes of the insects that allow them to survive the pesticide. If we use the pesticide a lot, pretty soon all of the insects will develop that mutation. A very small number of insects in a population have a mutation that makes them less susceptible to the pesticide. When we use the pesticide a lot, we kill off the majority of insects that don't have the mutation and the only insects that survive and breed are those with the mutation that makes them resistant. Insects exposed to a pesticide would, over time, build resistance to the pesticide. If two of these insects mate together, their offspring would be even more resistant to the pesticide. Which one of the following is NOT a consequence of the practice of tilling? Question 5 options: Increases rate of erosion of topsoil Changes interactions within the ecosystem of soil microorganisms Removes unwanted plants to reduce competition for nutrients. Increases the amount of organic matter and nutrients present in the soil

Answer 1

Ans 1) b) Adding inorganic fertilizer to the land to supply limited nutrients

The whole motive of Green revolution was to increase the agricultural crops and increase the far productivity. It was involved in agriculture productivity by selecting genetic traits that was able to support better production, increase use of artificial fertilizers, pesticides and machineries. It also increased the overall access to water by irrigation methods.

Ans 2) a) Absolute safety approach

This is a method where the risk of developing a harmful product is minimized but since absolute safety standards are maintained, the work is done in a restricted manner. It is very difficult to explore the full potential of technology and innovation.

Ans 3) The answers are first two because with the increase in the genetic engineering and artificial selection, the traits have become superior and hence this helps in better productivity of the crops. The genetic sequence of any type can be interested which might not have been formed by the natural process of mutation.

Ans 4) Ans is second option

A very small number of insects generally have the resistant gene and this makes them less susceptible to the pesticide. This occurs majorly by the process of natural selection where the ones that are not resistant die and only ones which are able to undergo mutation survive. Ans 5) Changes interactions within the eco-system of soil microorganisms. Tilling has majorly no affect on the microbial community that thrive on the soil