Adenine, Guanine, Cytosine, Thymine?
The upper most layer is the canopy
In asexual reproduction, there is only 'one' parent
<span>The human tympanic membrane or eardrum is a thin, concave membrane stretched across the inner end of the external auditory canal much like the skin covering the top of a drum. The eardrum marks the border between the outer ear and middle ear. ... The middle ear transmits sound from the outer ear to the inner ear.
Answer would be </span>
<span> tympanic membrane or eardrum</span>
