Answer:
an ANTIGEN
Explanation:
a foreign substance that invades your body is called an <u>A</u><u>N</u><u>T</u><u>I</u><u>G</u><u>E</u><u>N</u>. 8. When your body detects an antigen, antibodies are made and lock onto it. Once an antigen is recognized, your immune system can remember it the next time and protect you from getting sick again.
A. Pedigree is a tool that shows genetic traits that run in a family, such as cancer.
Answer:
Basically, the tendency to maintain a stable, relatively constant internal environment is called homeostasis. The body maintains homeostasis for many factors in addition to temperature. For instance, the concentration of various ions in your blood must be kept steady, along with pH and the concentration of glucose.
Explanation:
Answer:
The first step in the Scientific Method is to make objective observations.
The correct answer is air pollution