Question

in the first drop - down box, select the word part in the following term. then, in the second drop - down box, select the correct definition for that word part. thymectomy (click to select) (click to select) (click to select) thy thym mecto tomy

Explanation:

In medical - language terms, "thymeectomy" is composed of word - parts. "thym" refers to the thymus gland. The suffix "tomy" means cutting or surgical removal. So the main root word here is "thym" related to the thymus gland.

Answer:

First drop - down box: thym
Second drop - down box: thymus gland (surgical context implies removal related to the thymus gland as it's a surgical term "thymectomy")