Please help me please i give brainliest

Which is a kingdom? protistachordataprokarya mammalia

What is an example of a scientific question that galileo could not have answered with out this new tool?

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