Antonie van Leeuwenhoek is known for: (may be more than 1 answer) first observing microorganisms uncovering the process if transformation Making microscopes demonstrating that bacterial contact was neccessary for gene transfer using a U-tube experiment. What do celle of the marine bacterium vibrio harveyi do at high cell densities? conjugate undergo cell lysis glow in the dark uptake DNA from the enviorment release phage Solution Ans.a. Antonie van Leeuwenhoek was the first one observing microorganisms b.glow in the dark.