The correct answer is endothelium.
The endothelium is a thin layer of single-layered, squamous cells that can be found in the lumen of blood vessels, on the interior surfaces of the heart chambers, in the glomerulus of the kidney...The main function of endothelium is barrier function when it acts as a semi-selective barrier between the lumen of the vessels and surrounding tissue, and thus, controls the passage of materials. The endothelium is also included in functions such as fluid filtration in the kidneys, the control of blood pressure (vasodilatation and vasoconstriction), inflammation.
Bro noone creates the creator so no
Hey!
So for the first answer, neither Fungi or Bacteria contains the given protein.
For the second answer, I'm pretty sure that I think that Fungi can reproduce asexually or sexually, while Bacteria can only do it asexually.
For the fourth answer, bacteria can be both, but fungi scavenges nutrients from dead organic material.
That leaves answer three, which is true.
I hope this helped! I'm sorry if I'm wrong.
Toodles~
Lactic acid produced by fermentation causes the sour taste.