First two don't make sense.
Third is correct.
Last one would be volume.
i do not know i will help you sooner or later thank u
Answer:
The answer is C. Hormones
Explanation:
Cell, organism, heart, skeletal muscle, digestive system.
Answer:
Mitochondria
Explanation:
They are made of two membranes. The outer membrane covers the organelle and contains it like a skin. The inner membrane folds over many times and creates layered structures called cristae. The fluid contained in the mitochondria is called the matrix.
