Answer:
The mechanism of hearing. Sound waves enter the outer ear and travel through the external auditory canal until they reach the tympanic membrane, causing the membrane and the attached chain of auditory ossicles to vibrate.
Marsupials go in pouches like kangaroos and koalas they develop in the pouch they look similar to the adult aswell put the rest for mono
B because the diploids always line up in the middle on chromosomes