Question

a scientist identifies a cell with a cell wall, a plasma membrane, ribosomes, and a central nucleoid region containing a single circular chromosome. it lacks mitochondria and a nuclear envelope. how would this cell be classified?
as a prokaryotic cell, because it lacks a nucleus and membrane - bound organelle
as a plant cell, because it has a cell wall.
as an animal cell, because it lacks a cell wall.
as a eukaryotic protist, because it is single - celled.

Explanation:

• Prokaryotic cells lack a true nucleus (have a nucleoid region) and membrane - bound organelles like mitochondria. They have a cell wall (in many cases), plasma membrane, and ribosomes.
• Plant cells (eukaryotic) have a nucleus, membrane - bound organelles (including mitochondria), and a cell wall.
• Animal cells (eukaryotic) lack a cell wall and have a nucleus and membrane - bound organelles.
• Eukaryotic protists have a nucleus and membrane - bound organelles.

Answer:

As a prokaryotic cell, because it lacks a nucleus and membrane - bound organelle.