Which type of mutation is responsible for the change in the irna base?
options:
a) silent
b) missense
c) nonsense
d) insertion
need answer asap

A) silent - means that the letter changes but the outcome is the same
B) missense - means that it changes just one base pair
C) nonsense - changes something to a stop code and messes up the whole chain
D) insertion - adds a letter

so its A because you said "but during translation the iRNA strand still creates the same protein" so even though the mutation occurred the outcome was still the same. 

Dna overload will accrue

Used to water and cool climates, probably not thick coated or fluffy. they most likely have thin coats and have to survive to find food. sorry if this wasn't the answer you were looking for..: )