Approximately 250 million years ago, several events led to the greatest mass extinction known to man, an event referred to as the great dying. eighty-three percent of all species became extinct during this time period, and it is believed this was the closest that life came to end on earth. during what time period did the great dying occur?

What is the answer for the complicated molecules that make up living things usually contain carbon. why is carbon so important in these molecules?

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.

Organelles found in plant cells that function through photosynthesis to produce glucose from carbon dioxide and water are called — question 21 options: chloroplasts guard cells photosynthons