Question

select the part whose main job is to direct cell activities by sending instructions to different parts of the cell.
mitochondria
chloroplast
cell wall
nucleus

Explanation:

To solve this, we analyze each cell part:

• Mitochondria: Produces energy (ATP), not for directing cell activities.
• Chloroplast: In plant cells, does photosynthesis, not directing.
• Cell wall: Provides structure/support, no direction role.
• Nucleus: Contains DNA, controls cell activities by sending instructions.

Answer:

nucleus