The structural and functional unit of all living organisms is the ________.

A) ribosome
B) cell
C) organ
D) organelle
E) plasma membrane

Organelle

A specialized subunit within a cell that has a specific function, such as mitochondria, ribosomes, or the nucleus.

Ribosome

A cell organelle composed of RNA and protein, responsible for synthesizing proteins by translating messenger RNA.

Plasma Membrane

A bi-lipid layer structure that surrounds a cell, providing it protection and determining what substances can enter or leave the cell.