Okay, I would bend over backwards! :)
Leeuwenhoek was inspecting things under his artifial magnifying instrument and found single-cell living beings that he alluded to as protists.
Answer:
Driver
Explanation:
You can't tell if the car is moving by looking at the driver as they are in the car with you
Answer:
Mutualism
Explanation:
both humans and plants benefit from it because we breath out carbon dioxide
Substrate Concentration I believe
