If a series of genetic mutations prevented some, but not all, of the complement proteins from binding antibodies or pathogens, would the entire complement system be compromised?

What does it mean for a cell membrane to be selectively permable

Hey me with this one❤❤❤❤ every organism needs food. does a cell also need it? explain very briefly.

Which ideas did your answer contain? check all that apply. no food for organisms no oxygen in the atmosphere no trees or flowering plants no products based on trees or plants (building materials, medicines, fuels, fibers) no fossil fuels