Tailings are dangerous because they can
a. release toxic elements into the groundwater or surface water.
b. decrease the amount of nonrenewable resources available.
c. be very explosive.
d. increase the chances of a volcanic eruption.

State officials are considering constructing a road through a forested wilderness area. this action will likely affect the forest ecosystem in various ways. part a: predict how the construction of a road could negatively affect plants and animals in that ecosystem. (3 points) part b: describe one way that the construction of a road could have a positive impact of the forest ecosystem. (1 point)

In the practice of science, this type of reasoning is used to develop explanations.

Hershey and chase confirmed that dna, not protein, was the genetic material. how do the results of their two experiments support this conclusion?