This weak section of blood vessel is called an ANEURYSM. Aneurysm is defined as an excessive localized enlargement of an artery which is caused by the weakness of the artery wall. This weakness allows the artery to increase in size abnormally.
I dont see the question
tell in comment i will answer there
Chloroplasts (they are only present in plants)
Answer:
I think it's number 2 (viewpoint).....
Answer:
You need Light for Chlorophyll activation
So I guess its The Light Absorbing Pigment.