Lungs appear collapsed in the fetus because they are filled with amniotic fluid and they have never been inflated with air yet.
Answer:
Explanation: mass is the correct answer
Answer:
A
Explanation:
Enzyme activity is highest at 6.6. This means that 6.6 is the optimal pH for this enzyme. If the pH is too low or high the enzyme will denature and the enzyme activity will lower.
<span>Living things are biotic factors like a dog, fungi and trees
I hope this helps!</span>
