Based on the food chain below, if a bald eagle acquires 50 kg of energy, how much energy did the herbivorous duck get from the aquatic vegetation?

aquatic vegetation herbivorous duck bivalves sea ducks bald eagle
500 kg
5,000 kg
50,000 kg
500,000 kg

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.