Diabetic retinopathy as a result of chronically high blood sugar can cause blood vessels in the retina to hemorrhage, distorting vision.
Answer:
The 'gene' which causes (inherited, red and green types of) colour blindness is found only on the X chromosome. So, for a male to be colour blind the colour blindness 'gene' only has to appear on his X chromosome. For a female to be colour blind it must be present on both of her X chromosomes.
Explanation:
Answer:
they can fly , which requires alot of energy & keep their body warm with their feathers
