RNA travels to ribosomes, after leaving the nucleus, to perform translation and form amino acid with the help of tRNA
This means that her son is small compared to other 6 month old children.
A percentile is a measure between 0 and 100 that compares children of similar age in order to know if a particular child is growing well. The higher the percentile number, the bigger the child is compared to other children of same age. If a child is in the 50th percentile for height, it means the child is in the middle of the pack.
Space actually, as far as we know gravity is just a manifestation of the warping of three dimensional space created by matter. Without space, all else is doomed.
