Some molecule can pass through but others cannot because they are too large to pass through. This is also called selective permeability.
Hey There Maiam,
<span>What is the symbol equation for aerobic respiration?
Answer: </span><span>1. </span>Aerobic Respiration<span>. It is important that you learn both the word and chemical </span>equation<span>. In the above </span>equations<span> we see that glucose is broken down by oxygen to release energy with carbon dioxide and water being produced as by-products of the reaction</span>
A.
contracts to move substances through the body
D.
breaks down food to acquire nutrients
1.when you are in a lab you might get a substance on your hand so you wash your hands to prevent substance poisoning.
2.to prevent irratation of the skin.