Simple columnar epithelium is composed of a single layer of __ $(A)$ __ cells. Whose nuclei are located at the __ $(B)$ __ . Choose the correct option $:-$

Presence of tissues in a multicellular organism ensures

Pseudostratified columnar epithelium is found in

Lack of blood supply and presence of the noncellular basement membrane are the characteristics of the

Which protein provides color to the body?

Which of the following statements about cell junctions is false?
$(i)$ All the cells of the epithelium are held together with little intercellular materials.
$(ii)$ In almost all animal tissues,specialized junctions provide both structural and functional links between individual cells.
$(iii)$ Tight junctions help to stop substances from leaking across a tissue.
$(iv)$ Adhering junctions provide cementing to keep neighbouring cells together.
$(v)$ Gap junctions provide cytoplasmic channels between cells for the passage of ions,small molecules,and sometimes big molecules.