The Eukaryotic Ribosomes are of 80S.

Explanation:
Ribosomes are the cellular machinery responsible for protein synthesis. They are composed of two subunits, a large subunit (LSU) and a small subunit (SSU), which are assembled together during protein synthesis. The size of the ribosome is expressed in terms of sedimentation coefficient (S), which is proportional to the size of the ribosome.

Eukaryotic ribosomes are larger than prokaryotic ribosomes and are composed of a 60S large subunit and a 40S small subunit, which combine to form an 80S ribosome. The 60S subunit contains 3 rRNA molecules (28S, 5.8S, and 5S) and 49 proteins, while the 40S subunit contains a 1 rRNA molecule (18S) and 33 proteins.

The ribosomes are distributed throughout the cytoplasm and are also found in the rough endoplasmic reticulum (ER) and the mitochondria. The ribosomes in the rough ER are involved in the synthesis of proteins that are destined for secretion or for incorporation into the plasma membrane, while the ribosomes in the mitochondria are involved in the synthesis of mitochondrial proteins.

In conclusion, the eukaryotic ribosomes are composed of a 60S large subunit and a 40S small subunit, which combine to form an 80S ribosome.

Ribosome in eukaryotes is 80s (60 + 40 )