OUTLINE. Introduction to the Question: -A subclass of pheromones is necromones‚ which contain oleic acid as a primary component. -Some pheromones trigger aggregation between organisms‚ others can trigger separation. -Necromones trigger necrophoric (organisms remove their dead) or necrophobic (organisms avoid their dead) behavior. -Arthropods use pheromones‚ this includes sowbugs and cockroaches. Chemical signals are picked up by antennae. II. Hypothesis: When given a choice between two identical
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“Outline and evaluate research into one or more biological rhythms” [research = theories and studies] There are three main biological rhythms‚ which are called infradian‚ circadian and ultradian. Ultradian rhythms occur multiple times in one day. Circadian rhythms are cycles‚ which occur once a day‚ so within the 24 hours such as the sleep-wake cycle. Infradian rhythms are less frequent once in a day such as the menstrual cycle or hibernation. The research into these rhythms offers an insight
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Nobody would have expected just how much damage a palm sized toad could have done. Back in 1935‚ entomologists were trying to come up with a solution to the beetle infestation which caused the depletion of the sugarcane crop. Reginald Mungomery thought he had the solution by bringing in the cane toad‚ but eighty years later ecologists are still trying to fix the problem he caused. Mungomery’s theory worked in Hawaii with the toads eating the beetles. Unfortunately‚ the cane toads in Australia ignored
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Ceratopteris richardii: The effects of increasing spore density in detecting higher percentages of sexually expressed gametes. Abstract: The Ceratopteris genus is a model plant system in allowing the study of life and reproductive cycles of spores‚ allowing for spore to gamete cellular and physical observation. The triangle water fern‚ Ceratopteris richardii‚ provided for visual identification of this transition. Spores of different densities were inoculated‚ cultured‚ and observed in germination
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400 distinct odorant receptors Special proteins detecting different odors Complex olfactory system: Odorant receptors: identify different aromatic compounds and pheromones‚ and most dominant in ants Gustatory receptors: distinguish between different tastes and react to some pheromones Ionotropic glutamate receptors: narrowly tune to various poisonous and toxic compounds Two species will not have the same number of receptors‚ because of the difference of two species in terms of lifestyle Differences
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Sexual Orientation Definitions Biphobia: Irrational fears or hatred of bisexuality; the fear or hatred of bisexual feelings in oneself Bisexual: An individual who is attracted to people of both the same sex and of the opposite sex Gay: A male homosexual Heterosexual: A person whose primary erotic‚ psychological‚ emotional‚ and social interest is toward members of the opposite sex. Homophobia: Irrational fears or hatred of homosexuality; the fear of homosexual feelings in oneself; selfhatred because
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Can men and women be just friends without any sexual tension between them? I don’t believe so. I believe‚ both from personal experience and from several scholarly sources‚ that there is always‚ at some point‚ a sexual attraction between two people of the opposite sex who have a friendly‚ pleasant relationship. There are too many natural human instincts that drive us to be sexually attracted to a person for male-female friends to not ever experience physical attraction towards each other. From my
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COMPARISMS OF OPTIMIZATION STRATEGIES FOR THE TRAVELLING SALESMAN PROBLEM Department of Information Systems and Computing B.Sc. (Hons) Computer Science‚ Artificial Intelligence Academic Year 2012-2013 Comparison of Optimization Strategies for the Travelling Salesman Problem Adewale Oluwaseun Mako (0941620) A Report Submitted in the partial fulfilment of the requirement for the degree of Bachelor of Science Brunel University Department of Information Systems and Computing Uxbridge
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Scientific Writing 22 April 2003 The Influence of MHC Factors in Human Mate Selection Beth Ervin‚ Chris Maser‚ Shaun May‚ Audy Whitman Title: Byline: The Influence of MHC Factors in Human Mate Selection Introduction: The driving force of love may be much more than it appears. Should it now be “love at first scent‚” rather than “love at first sight”? If such a question were presented to a geneticist‚ he or she would say without a doubt “love at first scent” because the
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Katigbak‚ Laura Clarissa L. Biology 1 2009-41357 The Discovery Channel documentary ‘The Science of Sex Appeal’‚ explores not only the factors that humans take into consideration when choosing a possible mate‚ it also explains the chemicals that are involved in both choosing a mate and maintaining a long term relationship with that mate. Attraction can stem from different physical features ranging from facial symmetry to body movement and even voice. Humans look for characteristics that
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