Cost Benefits Quick Check Which is true about mining and minerals ending up in landfills? (1 point)
O Mining and landfills can damage the soil, but soil can regenerate quickly.
O Landfills, but not mining, can damage the soil, but soil can regenerate quickly.
Landfills, but not mining, can damage the soil, and it takes over a hundred years for soil to regenerate.
O Mining and landfills can damage the soil, and it takes over a hundred years for soil to regenerate.

Ageologist determines that a sample of a mineral cant be scratched by a steel nail but can be scratched by a masonry drill bit based on this information the sample mineral has to be softer than

1. variations in a population of moths allow for some of its members to be able to adapt to environmental changes. the better adapted of the moths will be able to survive the change and thus prevail as the “fittest” of the species. (a) describe three mechanisms in which variation can occur within a species population. (b) explain which mechanism or mechanisms would be responsible for the survival of a population of peppered moths better than white moths in an environment affected by industrial soot. justify your answer.

What did not occur in the proterozoic eon a)the oxygen levels increase greatly in the atmosphere,b)the emergence of the eukarya , c)muti cella’s eukaryotic organisms began to diversify,d)anaerobic bacteria kept thriving with more oxygen