Epithelial tissue can be found in the lining of internal organs. Certain types of epithelial tissue are only one cell thick. These cells also tend to have a large surface area. These qualities make it easy for substances to enter the epithelial tissue.
Based on the passage above, why would epithelial tissues be found in organs that are involved in absorption, such as the small
intestine?
Epithelial tissue is found in the lining of every internal organ.
Epithelial tissue is often thin and has a large surface area.
Substances can easily maneuver around epithelial tissue, as it is only one cell thick.
Substances can easily move through the large surface area of an epithelial cell.

You isolate an infectious substance capable of causing disease in plants, but you do not know whether the infectious agent is a bacterium, virus, viroid, or prion. you have four methods at your disposal to analyze the substance and determine the nature of the infectious agent.i. treat the substance with enzymes that destroy all nucleic acids and then determine whether the substance is still infectious.ii. microscope.iii. culture the substance on nutritive medium, away from any plant cells.iv. treat the sample with proteases that digest all proteins and then determining whether the substance is still infectious.if you already know that the infectious agent was either bacterial or viral, which method(s) listed above would allow you to distinguish between these two possibilities? a) ib) iic) ii or iiid) iv