The answer is d. you will recognize that heart tissue is tightly compacted and striated to allow the heart to beat, etc....
Which of what? I need more information to decipher that.
Answer:
2.)how much a certain area can hold is carrying compacity
3>)if a disease killed most of the producers the species would have a chance of dying out
Explanation:
Enzymes are protiens that control the speed of chemical reactions in your body therefore without these them the reactions would take place too slow for you to live.