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All animals possess which of the following organelles?

  1. Mitochondria

  2. Nucleolus

  3. Chloroplasts

  4. Nucleoplasm

The correct answer is: Mitochondria

All animals possess mitochondria, the powerhouse of the cell. This organelle is responsible for converting glucose into energy for the cell to use. While both the nucleolus and nucleoplasm are found in animal cells, they are not present in all animals. The nucleolus is responsible for producing ribosomes, while the nucleoplasm is the fluid inside the nucleus. Chloroplasts, on the other hand, are only found in plant cells and are responsible for photosynthesis. Therefore, the correct answer is A.