The function of tight junctions in epithelial tissue is to increase the surface area;

a. increase the strength and integrity of the tissue layer
b. increase the solute uptake in the tissue
c. increase the selectivity of transport across the tissue layer
d. increase the flow of water across the tissue layer.

c) option is correct

Explanation:

Cell junctions are specialized sites where two cells join, cell junctions are of three types:

Anchoring junctions, tight junctions, communicating junctions

Anchoring junctions hold cells together and communicating junctions connect two cells directly, communicating junctions include: gap junctions and plasmodesmata

Tight junctions seal paracellular boundaries of epithelial cells and prevent leakage of ions and diffusion of proteins in membrane

Proteins which form tight junctions are called claudin, occludin

The return of the wolf to yellowstone national park will probably affect the bird population to some degree, not significantly. while wolves will hunt birds when necessary, they prefer to hunt larger prey. the bird population will most likely only be affected when hunting is scarce for the wolves. birds of prey will also probably not be affected as much as other birds who spend more time on the ground hunting for food as the tend to spend more time in the air or in trees since they do not need to stay on the ground for long due to the nature of the way they hunt.