The average maximum temperature in Bilbao in March is 61Â°F/16Â°C and the average minimum temperature is 45Â°F/7Â°C. Weather in North-West Spain in March The north-west of Spain doesn't get much luck with the weather.
In biological classification, subspecies (abbreviated  subsp.  or  ssp. ; plural : subspecies) is either a taxonomic rank subordinate to species, or a taxonomic unit in that rank.
The other is the X chromosome. Y is the sex-determining chromosome in many species, since it is the presence or absence of Y that determines the male or female sex of offspring produced in sexual reproduction. In mammals, the Y chromosome contains the gene SRY, which triggers testis development.