What is the mass number of an atom that has 4 protons 4 electrons and 5 neutrons

Which of the following are false concerning microbes? a. microbes generate oxygen through photosynthesis.b. the primary role of microbes on the planet involves causing disease in animals and humans.c. microbes produce vitamins in the intestines.d. microbes play a role in breaking down waste and decomposing dead organisms.

Aperson with age is more likely to catch diseases that healthy people usually don’t catch.what are these infections called?

Describe two recent or ongoing space missions.