Heredity and sex . organs were evolved in allthe higher groups of animals by means of which thesperm of the male is transferred directly to the makes more certain the fertilization of the egg. In the mollusks, in the insects and crustaceans, andin the vertebrates the organs of copulation serve tohold the individuals together during the act of mating^and at the same time serve to transfer the semen of themale to the oviduct, or to special receptacles of thefemale. Highly elaborated systems of organs andspecial instincts, no less elaborate, serve to make the 24 HEREDITY AND SEX union
Heredity and sex . organs were evolved in allthe higher groups of animals by means of which thesperm of the male is transferred directly to the makes more certain the fertilization of the egg. In the mollusks, in the insects and crustaceans, andin the vertebrates the organs of copulation serve tohold the individuals together during the act of mating^and at the same time serve to transfer the semen of themale to the oviduct, or to special receptacles of thefemale. Highly elaborated systems of organs andspecial instincts, no less elaborate, serve to make the 24 HEREDITY AND SEX union possible. In some types mating must occur foreach output of eggs, but in other cases the sperm isstored up in special receptacles connected with the ductsof the female. From these receptacles a few sperm ata time may be set free to fertilize each egg as it passesthe opening of the receptaculum. In the queen beeenough sperm is stored up to last the queen for five orsix years and enough to fertilize a million
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Keywords: ., boo, bookcentury1900, bookdecade1910, booksubjectsex, bookyear1913
