One fourth means (one half) of (one half) .
So the 18 months must be two half-lifes.
The half-life of this particular isotope is 9 months.
Diffusion is the passive transport from a high concentration to a low without using energy. homeostasis results from balance.
Answer:
The Excretory System, The Reproductive System and The Endocrine System.
Explanation:
The Excretory System includes your bladder, uterus, and some of your organs. It is also called the "Urinary System". The Reproductive System includes your birth canal. This system helps to reproduce the body to have babies. The Endocrine System includes your hormones. It helps the body to depend on growth development or mood.
I hope this answers your question! :)
Answer:
"Starch, cellulose, dextran, and glycogen are all polysaccharides. The similarity in these molecules is that they all are polymers of glucose..."
