What is the best word to describe the probability that the spinner will stop on 3 or 4? a) certain b) unlikely c) impossible d) very likely

Which best describes red blood cells? a. they are colorless b. they protect against disease-carrying microorganisms c. they transport oxygen throughout the body d. they aid in blood clotting

Iron reacts with oxygen to produce iron oxide (rust). this reaction is represented in an equation as 4fe + xo2 → 2fe2o3. identify the value of x that will balance the equation.

The negative change found inside the plasma membrane is created by potassium ions sodium ions hydrogen ions chlorine ions