After receiving a stimulus, the send(s) signals to the appropriate areas of the body.

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.

Anne, an intern in a microbiology lab, was observing the characteristics of various specimens of protists. match each specimen to the category of protist to which it belongs.

Hemoglobin is a proton that carries oxygen around the body what is hemoglobin made from