If you go on mc3.edu/admissions/applying-to-mccc/testing-and-assessment/assets/biology-placement-test.pdf page 11 it will tell you all the answers to your questions....
Answer:
Diffusion is powerful over a particular distance and bounds the size that a character cellular can gain.
Explanation: If cellular is an unmarried-celled microorganism, consisting of an amoeba, it is able to satisfy all of its nutrient and waste needs via diffusion. If the mobile is too massive, then diffusion is useless at finishing all of these responsibilities.
Its skin so it protects the internal organs and systems
The human reproductive system is regulated by the endocrine system.
