Which of the following statements are correct for the tissue shown in the image?
$I$ - Flattened cells with irregular boundaries
$II$ - Secretory cells
$III$ - Single-layered
$IV$ - Found in the walls of blood vessels and air sacs of lungs
$V$ - Functions as a diffusion boundary

The type of epithelium found in the conjunctiva of the eye is:

Read the following statements and answer the question.
$(i)$ It is made of a single thin layer of flattened cells with irregular boundaries.
$(ii)$ They are found in the walls of blood vessels and air sacs of lungs.
$(iii)$ They are involved in functions like forming a diffusion boundary.
Which of the following characteristics of tissue is being described by the above statements?

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.

In animals,gametes are derived from which type of tissue?

The cell junctions called tight,adhering and gap junctions are found in