"in all areas of the world, groundwater is an important source or drinking water. however, in many areas, the groundwater is being polluted, mainly by nitrates. sometimes the groundwater is so polluted, it is no longer able to be used as drinking water. what is the most likely source of the nitrate pollutants?"

Study the diagram of a desert food chain . what would most likely happen if the kangaroo rats were killed off and removed from the food chain ?

Sarah and john are having a discussion on genetic diversity. sarah believes that it happen over a long period of time. john it happens immediately. who is correct? a. sarah is correct because genetic diversity occurs over a long period of time. b. john is correct because genetic diversity occurs immediately. c. both are correct because genetic variation can occur or long period of time. d. neither are correct because genetic diversity occurs over any period of time

How would you describe the the organisms in the second row of model 1 that are connected to the parents by a line