Final answer:
The nucleus directs a plant cell's activities by sending genetic instructions dictated by DNA to different parts of the cell, influencing gene expression and cell function.
Step-by-step explanation:
Yes, the nucleus directly influences a plant cell's activities by regulating the expression of genes, which involves sending instructions to various parts of the cell. This information is stored within DNA, which contains the blueprints necessary for the cell's operations. The nucleus, surrounded by a double-layered nuclear envelope, contains both DNA and the nucleolus, where rRNA is synthesized to form ribosomes. These ribosomes play a crucial role in protein synthesis, necessary for cell function and structure. Additionally, growth factors such as auxin and brassinosteroids are involved in plant cell division and differentiation, with the nucleus regulating their production and signal transduction pathways.