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Though the act of sex and the process of fertilization are but moments in a lifetime, all of the other factors that determine and regulate life appear to improve the likelihood of successful reproduction. Species adapt or disappear, and variations in sexual reproduction are but one—albeit a fundamental one—of the many physiological and behavioral phenomena that determine the life of plants and animals. Thus the natural history of sex cannot be examined apart from all of the elements necessary to support the life of a species—food, climate, other species sharing the same environment, relationships with other members of the same society. (19 minutes)



 
        

Item#: This title is currently not available.
Copyright date: ©1990



Part of the Series : Gender and Reproduction: A Natural History
     


Only available in the US, Canada, Australia/New Zealand, the United Kingdom, Ireland, Malta and South Africa.




Survival of the Fittest

Whether among fowl, frogs, crustaceans, insects, or elsewhere in the animal kingdom, aggressive behavior as a means of protecting territory and establishing sexual dominance doesn't always mean a fight to the death. This program gives clear examples ...(more details)
 
Mating Signals

Vibrations and songs, emissions of light, chemical signals and sexual odors-each species has its own method of signalling the other sex that the time is ripe for procreation. Depending on the social behavior of a species, males and females may have a...(more details)
 
The Rituals of Courtship

To ogle or preen, to dance, to feel, to ask to dinner or flaunt one's power literally or symbolically, to cloak one's intentions or air them freely-man has no monopoly on this catalogue of seductive behavior. From what appears like the tender, consid...(more details)
 
Recognizing Gender Differences

According to species, the sexes are recognizable to one another by shape, size, behavior, sound, odor. The program covers a range of animal behaviors, from gift-giving to aggression to what in humans would be called caressing-what should we call it i...(more details)
 
Behavioral and Biological Differences

Behavioral and social differences between the sexes in humans may be cultural, but some at least are clearly linked to biology. Using as an example an African village where the roles of sexes are strictly defined, this program shows that, in humans, ...(more details)
 


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