Which substances are needed for cellular respiration? use complete sentences to explain how the mass of hydrogen is conserved during cellular respiration.

What type of organism is a one-celled organism that functions as a single unit? a. bi-celled b. single-celled c. pre-celled d. multi-celled

According to theories of how life began, how did early organic molecules begin to separate from the outside world? a: specialized enzymes were required b: chains of amino acids created a barrier c: formation of microspheres or vesicles d: rna catalyzed the formation of membranes

What is the most important inorganic material for livings things? ! due tomorrow!