Question

1. in humans, which embryonic structure develops into ear canals and the eustachian tubes?

○ notochord
○ myotomes
○ pharyngeal slits
○ post anal tail

Explanation:

The notochord develops into part of the spinal column; myotomes form skeletal muscle; the post-anal tail is reduced in human embryos. Pharyngeal slits in human embryos develop into structures including ear canals and eustachian tubes.

Answer:

pharyngeal slits