Which of the following questions can be answered scientifically?

a. should we just let the river flow where it wants?

b. what can be done to stop erosion?

c. is erosion control worth the financial costs?

d. can planting cover crops reduce erosion?

In trying to determine whether dna or protein is the genetic material, hershey and chase made use of which of the following facts? a) dna contains sulfur, whereas protein does not. b) dna contains phosphorus, whereas protein does not. c) dna contains nitrogen, whereas protein does not. d) dna contains purines, whereas protein includes pyrimidines.

Which describes the habitat of a frog?

100 points and brainlest its 6th grade work compare the parts of a cell and the cell as a whole to another common nonliving system (i.e., a car, a city,