Answer:
Spread
Explanation:
People use envelopes very often. The germs people carry are put into the envelope and then it's sent out to many others.
Answer:
Due to urease activity, bacteria are able to use urea as a sole nitrogen source and produce ammonia, which increases the pH in the proximal environment, causing Ca2+ and CO32- to precipitate as CaCO3.
Carbon is 6
Iridium is 77
Helium is 2
Sulfur is 16 ( not sure)
Hydrogen is 1
So
Hydrogen
Helium
Carbon
Sulfur
Iridium
Sorry if I’m incorrect.
Answer: D. Like Protists
Explanation: A. isn't right
B. is worst
C. isn't good at all
D. is the best answer