Answer:
20.9 percent
Around 78% of the air is nitrogen gas, and only 20.9% is oxygen.
Explanation:
20.9 percent
Around 78% of the air is nitrogen gas, and only 20.9% is oxygen.
Hope this helps.
Answer:
By the production of white blood cells and antibodies.
Explanation:
The immune system's job is to identify foreign object and to make antibodies and white blood cells to fight said virus.
Science has shown that smoking causes cancer. Among these is an example
of how society responded to this information. Which one is this?
B. Forty-seven U.S. states now restrict smoking in public areas.
Answer:
A: The five components of physical fitness are
cardiovascular endurance, muscular strength,
muscular endurance, flexibility and body composition,
according to Fit Day.
