What have scientists genetically engineered to decompose toxic waste?

The correct answer is bacteria.

The decomposition is the process by which the bacteria and the other microorganism, breakdown the large molecules into smaller organic/inorganic component. these smaller components can be easily absorbed and mixed with the soil.

Naturally occurring bacteria generally cannot survive in toxic environment. by genetic engineering, scientists can introduce the gene, which can help them to survive in toxic conditions.

Genetically engineered bacteria can be helpful in decomposing the toxic waste.

correct answer is option a.

tropopause, stratopause and mesopause have all in common aspect that is point of maximum temperature in its layer of the atmosphere. all layers of atmosphere observe abrupt change in temperature. tropopause is the boundary between troposphere and stratosphere. stratopause is the boundary between stratosphere and mesosphere. mesopause is the boundary between mesosphere and thermosphere. these all boundaries are ranges between altitude of 0 to 80 km.

allowed for the prediction of the properties of missing elements.