Answer: Nitrogen stays in the air.
Hope this helps! :D
-TanqR
(Please mark me as brainliest)
Answer:
Selective breeding.
Explanation:
Sorry thats the only one i can think of. BTW have u watched lucky star.
I love anime.
Answer:
The average density of deer in 1923 was 1 deer per 8 acres
Explanation:
Given -
In 1923, the population of deer rose to 
The density of any species is equal to total population divided by total area of the land in which this population is residing.

Where d represents the density
P represents the population and
A represents the area of land
Substituting the given values in above equation, we get -

Thus, the average density of deer in 1923 was 1 deer per 8 acres
Cell wall I'm pretty sure
Answer: A.)
Explanation:
You know that PH stands for potential of hydrogen. U know that hydrogen is not acidic, so C is out of the way. So the correct answer is A.) It is basic.