The purpose of killer sperm


Biological Sciences, , DOI: When a female is pregnant or carrying eggs she has no choice but to wait until she has given birth or laid her eggs before she can reproduce again, and this can take a long time. Retrieved from " https: Evolutionary biology Evolutionary psychology Sexual selection Semen. Molecular mechanisms of gamete recognition and fusion at fertilization. Female x male interactions in Drosophila sperm competition. Cell and tissue research, 4 , PMID:
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Sperm competition

They may face inwards with their tails out the 'marguerite formation', named after the flower. The sperm whale is one of the species originally described by Linnaeus in in his eighteenth century work, Systema Naturae. Comments 54 Share what you think. American Cetacean Society Fact Sheet. The longer you have it, the greater the chance of the sperm swimming upstream. Animal orientation and navigation. This user is a member of WikiProject Cetaceans.
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Killer sperm: Sexual 'arms race' takes its toll on females

The study provides new insight into assortative mating -- the tendency for animals to reproduce with similar creatures -- as well as the evolutionary pressures posed by "aggressive sperm. Archived from the original on 5 June In many species, including humans, when a female is promiscuous ejaculates from multiple males may be inside her reproductive tract at the same time, meaning they are competing to fertilise the egg. Northern right whale dolphin L. In contrast to the smooth skin of most large whales, its back skin is usually wrinkly and has been likened to a prune by whale-watching enthusiasts.
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The purpose of killer sperm
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The purpose of killer sperm
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Sperm whale

The purpose of killer sperm



Description: Archived from the original on 16 May This recycling of air allows the whale to continuously generate clicks for as long as it is submerged. By using this site, you agree to the Terms of Use and Privacy Policy. Apple's new iPhone X is a glimpse into the future. Sure, nobody really thinks of worm sperm as being cute and cuddly -- assuming one thinks about them at all -- but who would have thought they were stone cold killers?

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Views: 1755 Date: 26.07.2017 Favorited: 5 favorites

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