Humans are warm blooded and can't be cold blooded because of the environment we live in. We can't sit still during the winter and soak up warmth from the sun.
Answer:
i think they are orignally from cold areas so they store water and moisture in there needles. and they stay green year round.
Explanation:
There are two hydrogen atoms in a molecule of water.
Answer:
c. macula densa
Explanation:
The cells of the macula densa are sensitive to the concentration of sodium chloride in the distal convoluted tubule. They are a part of the nephron.