Answer:
I'm sorry what?
Explanation:
carbon dioxide is a waste product of cells
Answer:
The polio strains cannot reproduce because they are weakened.
Answer:
Frog forelimbs are typically short as the hind limbs are the principal limb pair generating propulsion.
The border between the
transparent edge of the cornea and the white of the fibrous sclera is the limbus.
The limbus contains clusters of limbal stem cells that help to maintain the corneal
epithelium and to regulate corneal transparency and vision throughout life. The
limbus also acts as a boundary that protects the conjunctiva and its blood
vessels.