Which of the following cells possesses only a single outer membrane?

Select the correct option for the following statements:
$(i)$ $A$ chromosome in which the centromere is situated near the middle is called a metacentric / submetacentric chromosome.
$(ii)$ The air vacuole / contractile vacuole helps in osmoregulation.

Which of the following is an endomembrane system component?

Find the correct set of structures/organelles not surrounded by membrane.

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

Select the correct option that matches the cell organelle with its function:

Cell Organelle	Function
$(A)$ Endoplasmic Reticulum	$(i)$ Powerhouse of the cell
$(B)$ Free Ribosomes	$(ii)$ Involved in osmoregulation and excretion
$(C)$ Mitochondria	$(iii)$ Lipid synthesis
$(D)$ Contractile Vacuole	$(iv)$ Protein synthesis