Answer:
Explanation:
A mutation in DNA alters the mRNA, which in turn can alter the amino acid chain.
The experimental group is the group you change from the normal. the fertilizer group is experimental
The correct answer is tympanometer. A tympanometer is not used to measure hearing, but to rather measure the transmission of energy through the middle ear. In this way, tympanometry is an objective test of the function of the middle-ear. Tympanometry is used alongside other measures to asses hearing, such as pure tone audiometry.