Genetics is the branch is science that explains what?

The body is protected against harmful flu viruses by

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

20 points and brainlist 1. london has suffered from terrible air pollution for at least seven centuries. why is the city so prone to its famous “london fog? ” what did london do to get rid of its air pollution? 2. why does air pollution cause problems in developing nations more than in developed ones?