Which organelle is found in the nucleus and produces ribosomes?

a. nuclear envelope
b. mitochondria
c. lysosome
d. nucleolus

D. The nucleolus. I suggest looking at a cell diagram (if you have not already).

here's a link to help you find what you're looking for!

www.cellsalive.com/cells/cell_model.htm

The organelle found in the nucleus and responsible for producing ribosomes is the nucleolus. To arrive at this answer, we can eliminate options a, b, and c by understanding their functions and locations in the cell.

- The nuclear envelope, also known as the nuclear membrane, is a double-layered structure that surrounds the nucleus. It acts as a barrier and regulates the flow of substances in and out of the nucleus.
- Mitochondria are membrane-bound organelles found in the cytoplasm of the cell, not within the nucleus. They are responsible for generating ATP, the cell's main source of energy.
- Lysosomes are small vesicles filled with digestive enzymes primarily involved in breaking down cellular waste and recycling cell parts. They are also not found in the nucleus but in the cytoplasm.

Therefore, we can conclude that the correct answer is d, the nucleolus.