Which of the following is not a functionally analogous pair?
pili-centrioles
peptidoglycan-cellulose
bacterial flagella-9 + 2 flagella
70s ribosomes-80s ribosomes

you need more balloons

it's d - life cycles - apex

the correct answer is option d.

an appositive is a noun, noun phrase or noun clause which follows another noun or noun phrase in order to describe it or name it another way. they are usually used between commas, brackets or dashes.

the example sentence with the correct use of commas is the following:

her uncle, the man over there in the red shirt, owns the hardware store in town.