Two children are trying to determine their parents blood types for a school project. One child has type A blood, and one child has type B blood. What are
the possibilities for their parents' blood types

What is point source pollution of an aquatic ecosystem? a) pollution of freshwater sources b) pollution from many sources that combine into one c) pollution that occurs over a wide area; water that runs off from fields, parking lots, and other land surfaces d) pollution that can easily be identified with a single discharge source, such as an open pipe which drains into a body of water