Question

1. what is referred to as the master gland of the body?

pituitary
adrenal
parathyroid
pineal

1. what is the word part attached to the end of a word root in order to modify its meaning called?

prefix
combining form
word root
suffix

Explanation:

For question 57:
The pituitary gland is often called the "master gland" because it controls the functions of many other endocrine glands. It secretes hormones that regulate growth, metabolism, reproduction, and other vital processes.
For question 58:
A suffix is a word part that is attached to the end of a word root to modify its meaning. For example, in the word "happiness", "happy" is the root and "ness" is the suffix that changes the word from an adjective to a noun.

Answer:

1. Pituitary
2. suffix