Question

which characteristic is shared by all four cells?
membrane - bound organelles that transport substances
a mechanism for transforming sunlight into energy
they all have dna

Explanation:

Step1: Analyze membrane - bound organelles

The first cell (bacterium) is a prokaryote. Prokaryotes lack membrane - bound organelles for transporting substances (like endoplasmic reticulum in eukaryotes).

Step2: Analyze sunlight - transforming mechanism

Only plant cells (the third cell in the image, assuming it's a plant cell with chloroplasts) have chloroplasts to transform sunlight into energy via photosynthesis. Bacteria, animal - like cells (second and fourth cells) do not.

Step3: Analyze DNA presence

All cells (prokaryotic and eukaryotic) have DNA. Prokaryotes have circular DNA in the nucleoid region, and eukaryotes have linear DNA in the nucleus.

Answer:

They all have DNA.