The part anti means opposed. Biotic is basically all the naturally occurring organisms. So an antibiotic would oppose an organism like a virus.
Stem cells are what allow planaria to grow and regenerate as the stem cells can change into any of the cells that make up the planaria.
Nervous muscle action pressure
The cautions that can be given to the friend include the following:
Eating foods from different sources is very advantageous because it ensures that one gets all the necessary food nutrients that are needed for proper growth and development. Getting the necessary food nutrients on the other hand will boost one's immunity and enable one to develop resistance to diseases. Restricting one's food to a limited type of food is very bad and can have fatal consequences.
it allows for nutrients to come into the cell using passive tranport aka moving anything on a gradient without the use of energy (ATP).
