In which tissue are strong cell adhesions and gap junctions found?

Which insoluble protein is present in scales?

Which tissue evolved first in animals?

What type of epithelium is found in the trachea?

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.

$A$ : In non-keratinised stratified squamous epithelium,the stratum corneum is without keratin.
$R$ : Such epithelium occurs over surfaces which are not exposed to drying but are subject to abrasions.