Which of the following is true regarding the cell theory choose all that apply?

The correct answers are option C and D.

Explanation:

The three basic sayings of the cell theory are that all the living components are formed of cells, the cells are the basic unit of all living species, and all the cells originate from the preexisting cells. All the living things, that is, from microscopic species to the largest one like whale, are all formed of cells. These cells can differ broadly, however, all the living components are formed of cells.  

The cells in a living being cannot be further dissociated into any more level. Like the atoms and matter, the cells and living species are associated, that is, at their most basic level, the living species are formed of cells.  

answer; i believe its echoic memory,it is believed to last three to four seconds; good luck

the sugar-phosphate backbone forms the structural framework of nucleic acids, including dna and rna. this backbone is composed of alternating sugar and phosphate groups, and defines directionality of the molecule.