Prokaryotic and eukaryotic cells share some common structures. The structures that are present in both types of cells are:
A. ribosomes
D. DNA
Therefore, the correct selections are A and D.
Explanation:
- Ribosomes: Both prokaryotic and eukaryotic cells have ribosomes, though they differ in size and structure.
- DNA: Both types of cells contain DNA; however, prokaryotic DNA is typically circular and found in the nucleoid region, while eukaryotic DNA is linear and contained within the nucleus.
The other options are not shared by both cell types:
- Flagella may be present in both, but the structure and composition differ significantly between prokaryotes and eukaryotes.
- Mitochondria are found only in eukaryotic cells.
- Nucleus is a defining feature of eukaryotic cells and is absent in prokaryotic cells.