They are semi-permeable because they can diffuse and pass through the plasma membrane easily.
I’m pretty sure it’s nanoscopic animal since nanospoic means extremely small and animal is another way of saying livestock so it’s nanoscopic animal or animals :) (I hope this helps you in any way)
They adapt because they are forced to survive. An example would be certain animals gaining the ability to camouflage to protect themselves from predators.
