Large numbers of ribosomes are present in cells that specialize in producing proteins.

Here's why:

* Ribosomes are the protein factories of the cell. They translate the genetic code from messenger RNA (mRNA) into the sequence of amino acids that make up a protein.

* Protein synthesis requires a lot of ribosomes. The more protein a cell needs to produce, the more ribosomes it will have.

* Cells that specialize in protein production have high demands for protein synthesis. Examples include:

* Muscle cells: Need to produce large amounts of contractile proteins (actin and myosin)

* Pancreatic cells: Produce digestive enzymes like insulin and glucagon

* Antibody-producing cells (B cells): Produce large amounts of antibodies

* Cells that secrete hormones: Need to produce large amounts of hormones

Let me know if you have any other questions!