*Question*
You are presented with the question "What control many cell activities and are very important for the chemical equilibrium of the body?" and the following answer choices: - organs - Energy - critical organs - sweating - Organic compounds - pancreas - hydration - the hormones Now knowing that hormones control many cell activities, so they are very important for homeostasis and homeostasis is the chemical equilibrium of the body, choose the best answer.
**Answer**
the hormones

*Question*
You are presented with the question "What does HIV contain?" and the following answer choices: - p53 - RNA - DNA - CFCs - ova - gene - HPV - mold Now knowing that viruses contain DNA but not much else and where most viruses are DNA, HIV is an RNA virus, choose the best answer.
**Answer**
RNA

*Question*
You are presented with the question "What is vital for healthy roots?" and the following answer choices: - green leaves - nutrients - a healthy stem - hydration - looseness of soil - nearby mushrooms - aqueous solution - Organic compounds Now knowing that the looseness of soil increases the amount of oxygen in that soil and oxygen in the soil is vital for healthy roots, choose the best answer.
**Answer**
looseness of soil

*Question*
You are presented with the question "What does a gas mask keep out?" and the following answer choices: - disease - The atmosphere - heat energy - air pollution - energy barrier - Bodily water - Dehydration - bacteria Now knowing that abreathing mask is used for keeping harmful particles from entering the respiratory system and air pollution is caused by the build-up of harmful gases and particles in the air, choose the best answer.
**Answer**
air pollution