Aman who is colour
blind marries a woman
who is a carrier for red
green blindness. what y
ĕ chances that their
sons will be colour blind

100 percent.

Explanation:

If both parties are colorblind in any way, then there is a 100 percent chance that the son will have at least one color that they can not see, or tell.  

answer: the blood-brain barrier is a layer of specialized membranes and cell processes designed to keep undesirable substances from passing from the bloodstream into the precious tissues of the brain. while the blood-brain barrier does keep most bad things out of the central nervous system, it is not impermeable.

explanation:

climate change and pollution