Question

Which of the following were present in the common ancestor of Bacteria, Archaea and Eukarya?

1) Nucleus
2) Cell membrane
3) Mitochondria
4) Chloroplasts

Answer 1

The common ancestor of Bacteria, Archaea, and Eukarya had a nucleus, cell membrane, mitochondria, and chloroplasts.

Step-by-step explanation:

The common ancestor of Bacteria, Archaea, and Eukarya had the following features:

1. Nucleus: The presence of a nucleus is a defining characteristic of eukaryotic cells, which are found in plants, animals, fungi, and protists.
2. Cell membrane: All cells, whether prokaryotic or eukaryotic, have a cell membrane that separates the cell from its environment.
3. Mitochondria: Mitochondria, which are found in eukaryotic cells, likely evolved through endosymbiosis with bacteria. They play a crucial role in energy production.
4. Chloroplasts: Chloroplasts, which are responsible for photosynthesis, evolved through endosymbiosis with cyanobacteria and are found in plants and some protists.