* Chloroplasts are the organelles responsible for photosynthesis. They contain chlorophyll, the pigment that absorbs light energy.

* Plant roots are specialized for absorbing water and nutrients from the soil. They are typically underground and don't receive sunlight.

* Therefore, plant roots do not need to perform photosynthesis and therefore lack chloroplasts.

Other structures commonly found in plant root cells include:

* Cell wall: Provides structural support.

* Cell membrane: Regulates what enters and exits the cell.

* Nucleus: Contains the cell's genetic material.

* Vacuole: Stores water and other substances.

* Mitochondria: Provide energy for the cell through cellular respiration.