A. is a neutral substance.
Only neutral substances (like pure water) can have a pH of 7.
Answer:
c
Explanation:
I would think it would be c because that is what I would chose
The correct answer is visible light, or more precisely the light spectrum. All colors exist because of it and other colors are variations of these colors or mixtures of them.
Explanation:
-body temp: when cold, erector muscle contract, hair raise, vasoconstriction occurs, sweat production reduces, muscle shiver to enhance metabolism, and thyroid gland secret more thyroxine to enhance metabolism
-water potential balance: when we are thirsty, pituitary gland secret more ADH, kidney tubules become more permeable to water, so more water re-absorbed, less urine produced, retaining more water.
