Final answer:
The compound noun in the given sentence is 'insect life cycles,' and it highlights the importance of proper naming or nomenclature in various disciplines.
Step-by-step explanation:
The compound noun in the sentence "During class, Professor Dominquez lectured about insect life cycles" is insect life cycles. A compound noun is a noun that is made up of two or more words that function as a single noun. Compound nouns can be written as separate words, with a hyphen, or as one word. The concept of proper naming or nomenclature is important across various fields, such as biology where the accurate classification of species including insects is crucial, resulting in unique genus and species names. Similarly, in medicine, having precise names for drugs is critical to ensure the correct treatment is given.