That is where the fibers of the optic nerve exit the eye extending into the brain. there are no rods and cones there as a result.
Answer:
Birds and bats have homologous limbs because they are both ultimately derived from terrestrial tetrapods, but their flight mechanisms are only analogous, so their wings are examples of functional convergence.
The energy in food substances is released in chemical reactions that take place within the mitochondria which are present in some single celled organisms.
Enzymes as they are biological catalysts
