Track and field facilities are usually designed as multi-purpose facilities (tracks with playing fields inside). Sports facilities for track and field athletics are generally used for daily training as well as for staging regional or local competitions. The staging of competitions at higher levels normally entails more extensive requirements for the sports facility, particularly in respect of the infrastructure. Generally athletics tracks are multiâÂ­purpose with the interior of the 400m track used as a pitch for soccer, gridiron and rugby.
Parents have two genes for pos/neg blood type, and only one of them needs to be positive for the parent to have positive blood type. Most positive-blooded people have oneâ¦ positive gene and one negative gene. If both positive parents pass on their negative gene, they can have a child with a negative blood type.
When an Rh negative mother is carrying an Rh positive baby, some of the Rh positive blood from the baby gets into the Rh negative blood of the mother. This Rh positive blood from the baby acts like a foreign substance to the mother.n pregnancy, Rh is especially important when an Rh negative woman carries an Rh positive child. Remember, when a woman is Rh negative, it means she does not have the Rh factor. In the normal course of pregnancy, small amounts of the baby's blood get into the mother's bloodstream.