Http://www.pbs.org/wgbh/nova/cancer/folkman.html
I believe this website will help :)
20 chromosomes because unfertilised eggs contains half the number of bodily chromosomes
I honestly think that a or d would be the best options. I would start with D and if that doesn't work try a.
The answer is young child.
Nasal regurgitation it's when the food regurgitates out of the nose.
This is more likely to occur in babies/ young children with some birth defects in the soft palate, or if they have a cleft lip. Those birth defects, usually, get fixed with surgery when they are still children, that's why is less frequent after that age.
