Answer:
Metabolic wastes or excretements are substances left over from metabolic processes (such as cellular respiration) which cannot be used by the organism (they are surplus or toxic), and must therefore be excreted.
This is what i found out i hope this is a good enough answer!! :P
Answer:
1. Positive internal effects could make you feel better inside. Positive external effects could make you look more buff and muscular.
2. Negative internal effects are that it kills your organs. And Negative external effects are that some drugs can make you look weird.
Remember! Don’t do Drugs and stay safe!
Yes, i mean atleast the school years almost over