In most ecological communities, plants are the first level of the trophic structure, known as producers. what do plants produce that supports the higher trophic levels of the community

Idont think i'm understand this some one me! before we begin our discussion on evolutionary theory, reflect on your personal philosophical or religious views with regards to evolutionary theory. what is the difference between science and religion?

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.

What are some natural processes that represent physical and chemical changes?