Acalorie is the commonly used unit of chemical energy. it is also the unit ofa. radioactivityb. lightc. heatd. sound

Agene in a type of bacteria when the ses bacteria reproduce asexually this mutation can only be inherited by

Which would happen if more forests were cut down? a. the nitrogen cycle would be stopped b. nitrogen would be fixed by bacteria more quickly c. the amount of co2 in the atmosphere would increase d. fossil fuels would build up in the soil c the amount of co2 in the atmosphere would increase

Ecologist have observed a sharp increase of sulfur dioxide in the air . what might be a possible consequence of excessive sulfur dioxide in the air ? a. acid rain b. ozone layer depletion c.ozone layer hole d.increase in sea levels