Answer:
Replace the concentration description with their value
Blubber
The cell membrane is selectively permeable
Passive transport
From low concentration to high concentration
The Answer is C. Pathogens
Plz mark brainlest!!
The answer is A. 36 to 38 molecules
I think it is the 3rd one because health problems at older age.
I believe it's (C). A is DNA which is not enclosed in a nucleus ,as in prokaryotic cells