Epithelial tissues line the outer surfaces of organs and blood vessels throughout the body, as well as the inner surfaces of cavities in many internal organs. ... Functions of epithelial cells include secretion, selective absorption, protection, transcellular transport, and sensing.
Hoped this helped!
Answer:
DNA is double stranded, and the strands are antiparallel because they run in opposite directions.
Explanation:
Each DNA molecule has two strands of nucleotides. Each strand has sugar phosphate backbone, but the orientation of the sugar molecule is opposite in the two strands.
Hundreds or thousands of years.
