Which of the following has a positive charge and a mass of one amu?

18. over time, how do sand dunes tend to migrate? a. perpendicular to the movement of the wind b. in the same direction as the wind blows c. toward the wind d. in random directions

Which of the following types of pollution is most responsible for large numbers of deaths worldwide because of unsafe drinking water? (a) nutrient pollution (b) thermal pollution (c) pathogen pollution (d) sediment pollution

Cloning an individual usually produces orangisms that (1) contain dangerous mutations (2) contain identical genes (3) are identical in appearance and behavior (4) produce enzymes different from the parent