Answer:
A. Cell membrane, DNA, ribosomes
Explanation:
I'm not so sure, sorry if i'm wrong ):
The difference between the meanings of combining forms spondyl/o and vertebr/o is spondyl/o and vertebr/o both mean vertebra. There is no difference because they are both vertebra.
Spondyl/o is a combining form meaning vertebrae. The two combining forms for vertebrae bones of the spine, are vertebr/o and spondyl/o.
Dermis and Epidermis. The Epidermis contains keratinized cells. The Dermis <span>contains papillae.</span>
The correct option is c. (20 m) .
As the formula to calculate wavelength is :
wavelength = wavespeed / frequency