Why would cells perhaps be specialised?
To carry out a particular function.
How do dissolved substances pass into and out of cells?
By diffusion.
What are the parts of a generalised animal cell?
Cell membrane, Cytoplasm, Nucleus.
What are the parts of a generalised plant cell, and a generalised plant cell only?
Chloroplast, Cell wall, Vacuole and Nucleus [found in both animal and plant cells.]