Some investigators concluded that the first organisms consisted of rna rather than dna. what is importance of this "rna world" period?

C, h, o - elements that are common to biomolecules. if the biomolecule in question is a protein these elements also combine with nitrogen. which molecule below is a protein?

The carbon cycle is best defined as a process in which a. carbon changes from inorganic forms to organic forms and back b. carbon is changed into other elements such as oxygen or nitrogen c. carbon is continually created from the sun’s energy by plants d. carbon is consumed and regenerated from other elements such as oxygen and nitrogen

Name the organism that belongs to the kingdom protista.