This is because they contain only one complement of chromosomes, which is the signal in bees, ants and wasps that an embryo should develop into a male.
But Regina Rabinovich of the Gates Foundation, one of the largest philanthropic agencies in the world, says small private gifts complement official aid in multiple ways: when simple folk empty their pockets, that bolsters political support for government help.
Forest Pitch is one of a range of projects commissioned to complement the 2012 Olympics and Paralympics.
BBC: London 2012: Selkirk forest football kit designs picked
Regional operators are teaming up with private equity firms to place bids on one or two of the clusters that would complement their own businesses.
To complement the workshops, students can engage in an internship for a maximum of one semester in order to obtain more substantial work experience to support their future development.
He poured me a glass of Le Baccanti, an Apulian Primitivo, which was just dry enough to complement rather than overwhelm the dishes coming at me at the rate of roughly one per every half-eaten plate.
The goals of maximizing profit and fulfilling a moral agenda conflict more often than they complement one another, and investors who want to put ethics first have turned out to be relatively few.
With the emergence of the Social TV phenomenon, one can see TV and social media now complement each other.
Instead of one satellite carrying every instrument, EPS-SG is likely to split the complement across two separate platforms.
South Korea's researchers have taken egg cells from volunteer women, removed the nuclei from those cells (which contain only half of the genetic complement required to make a human being, since the other half is provided by the sperm), and replaced each nucleus with one taken from one of the volunteer's body cells (which contains a full genetic complement).
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