I believe that the answer is biosphere<span />
The answer is A. Class, because the divisions get smaller and smaller as they go down. Class is before Order so the division would be bigger.
They carry out every reaction happening within the body, hence they sustain life.
Answer:If the enzyme changes shape, the active site may no longer bind to the appropriate substrate and the rate of reaction will decrease. Dramatic changes to the temperature and pH will eventually cause enzymes to denature.
Explanation:
The integumentary system reduces water loss, contains receptors that respond to touch, it regulates body temperature and protects the inside of the body from damage.
Hope this Helps :)
