Wich structure produces chemicals that regulate the reproductive cycle?

Which element forms the basis of all organic organisms a carbon b oxygen c hydrogen d nitrogen

Students commonly confuse saccharomyces cerevisiae and staphylococcus aureus when viewed on a microscope slide how could you microscopically differentiate

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