The answer for this question would be Integument, digestive, respiratory and urogenital.
The largest system that contact with the external environment would be integument and digestive. That makes two system has normal flora of microbes and not sterile like the other systems. Normal flora of microbes will prevent the pathogen microbe grows so it gives some benefit.
One cell produces two genetically identical daughter cells is both mitosis and meiosis.
Answer:
D) a scientific journal about chemistry and a biography of a famous chemist
Fungi has a cell wall but no chloroplasts.
