Attached are my notes over this topic. I hope it helps.
Answer: The relationship between culture density and toxin secretion is linear.
Explanation:
The relationship that exist between culture density and toxin secretion is linear. Cultures that are grown in high standardized density secret large amount of toxin while cultures grown at low density secret low amount of toxin.
Toxin is a poisonous substance.
I believe the correct answer would be D, turning up the heat in cold water. Because you are then paying more money to turn the heat up instead of Doing the other ideas.
Answer:
The statement is true because most organisms are made of water, and water consists of mostly hydrogen (atoms) since its chemical formula is H2O.
Answer:
D. A brown gas produced
Explanation:
When a chemical reaction occur, there are several changes that takes place such as change in color, odor change, formation of a gas, and formation of a precipitate etcetera.
In the given chemical reaction, two colorless gas (NO and O2) react together and form brown gas (NO2). So, the change of gas from colorless to brown gas is the evidence that shows chemical reaction occurred.
Hence, the correct option is "D. A brown gas produced".