Infrosomes are composed of .........?

Describe the structure of the following with the help of labelled diagrams.
$(i)$ Nucleus
$(ii)$ Centrosome

Which of the following is a nuclear stain?

Prokaryotic cells do not have:

Which of the following statements is/are correct?
$(i)$ The endomembrane system includes plasma membrane,$ER$,Golgi complex,lysosomes and vacuoles.
$(ii)$ $ER$ helps in the transport of substances,synthesis of proteins,lipoproteins and glycogen.
$(iii)$ Ribosomes are involved in protein synthesis.
$(iv)$ Mitochondria help in oxidative phosphorylation and generation of $ATP$.

The given figures show two types of cells. Which structures are common to both the cells?