The scale below shows the pH levels of various liquids. pH scale showing ammonia (11.6), sea water (8.3), pure water (7), vinegar (2.5), and battery acid (1) pH scale showing ammonia (11.6), sea water (8.3), pure water (7), vinegar (2.5), and battery acid (1) Which of the following substances is a strong acid? Choose 1 Choose 1 (Choice A) A Ammonia (Choice B) B Sea water (Choice C) C Battery acid (Choice D) D Pure water

Which best describes meiosis? a. it produces cells that are identical to the original cell b. it is responsible for the replacement of damaged skin cells c. it is responsible for growth of the organism d. it produces male and female sex cells

Select the correct answer. which mutation is harmful to the organism? a. a mutation allowing moths to camouflage better on blackened tree bark b. a mutation making staphylococcus aureus resistant to the antibiotic methicillin c. a mutation inhibiting human immunodeficiency virus from attaching to and entering the cell d. a mutation causing uncontrolled cell division e. a mutation giving plant leaves a bitter taste to discourage herbivores from eating them

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.