The second law of thermodynamics states that: A. one usable form of energy cannot be completely converted into another usable form.

B. one usable form of energy can be completely converted into another usable form.

C. energy can be created and destroyed.

D. energy can be neither created nor destroyed.

E. energy cannot be transformed.

Why is it important to reduce the number of chromosomes in half when forming gametes for sexual reproduction?

Which two factors contributed to creating a global culture? the creation of the united nations improvement in telecommunications health issues such as the ebola virus increased opportunities for global travel

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.