Which of the following is a gas molecule composed of three oxygen atoms? a. nitrogen oxide
c. sulfur dioxide
b. ozone
d. smog

Chicken pox and hepatitis are bacterial diseases. true or false?

Cpr, or cardiopulmonary resuscitation, is a first-aid technique to save lives. it involves compressions of the patient's chest cavity. which description is the best description of the functions of chest compressions in cpr? chest compressions are done to pump the heart. chest compressions are done to strengthen the rib bones. chest compressions increase carbon dioxide inhalation. chest compressions allow the patient's muscles to wake up.

10. in which phase will crossing-over occur? a. mitosis b. metaphase ii c. prophase i d. meiosis ii