The error lies in the use of "an" before "single administrative structure." The correct article to use here is "a," not "an," because the word "single" begins with a consonant sound. The article "a" is used before words that start with a consonant sound, while "an" is used before words that start with a vowel sound.
The study of lizards is known as
What is the normal blood pressure range for a healthy adult?
Which vitamin is produced by the human skin when exposed to sunlight?
Which enzymes are contained in pancreatic juice?
Which component is incorrectly listed as part of the phloem structure?
Bile is secreted by _________
Which disease is caused by bacteria?
Which of the following hormone used as the medication to facilitate childbirth?
RNA molecules are composed of nucleotides that include ribose sugars, nitrogenous bases, and which additional groups?
Which human organ is affected by 'Xerophthalmia'?