![A comparison of parasite loads on asexual and sexual Phoxinus](http://s1.studyres.com/store/data/000071423_1-5e4761aba368f72e9a98260e2bee16b5-300x300.png)
A comparison of parasite loads on asexual and sexual Phoxinus
... the progenitor species (P. eos (Cope, 1861) and P. neogaeus Cope, 1867) (Goddard et al. 1989). These asexuals, which are almost all female, reproduce via gynogenesis (Goddard et al. 1998). In contrast with many other asexual species (e.g., Vrijenhoek et al. 1978; Lively and Dybdahl 2000), there is v ...
... the progenitor species (P. eos (Cope, 1861) and P. neogaeus Cope, 1867) (Goddard et al. 1989). These asexuals, which are almost all female, reproduce via gynogenesis (Goddard et al. 1998). In contrast with many other asexual species (e.g., Vrijenhoek et al. 1978; Lively and Dybdahl 2000), there is v ...
The Anguish of Embodiment
... exterior. It also suggests an internal sensation of sexual pleasure that is quite different from what the external body projects: not dominion, not the force of the phallus, but an interior awareness of bliss that unfolds with tremendous fragility. And it goes beyond eroticism to signify emotion, a ...
... exterior. It also suggests an internal sensation of sexual pleasure that is quite different from what the external body projects: not dominion, not the force of the phallus, but an interior awareness of bliss that unfolds with tremendous fragility. And it goes beyond eroticism to signify emotion, a ...
Biology pages:Layout 1
... Analysis and Open Ended (pp. 60–61) 24. Three important cell organelles and their functions can include the following responses: the cell membrane allows oxygen, carbon dioxide, water, and other substances to enter and leave a cell; a chloroplast uses water, carbon dioxide, and the sun’s energy to m ...
... Analysis and Open Ended (pp. 60–61) 24. Three important cell organelles and their functions can include the following responses: the cell membrane allows oxygen, carbon dioxide, water, and other substances to enter and leave a cell; a chloroplast uses water, carbon dioxide, and the sun’s energy to m ...
Chapter 11
... 7. The haploid mictic eggs of some rotifers, if not fertilized, develop parthenogenetically into A) dormant eggs. B) males. C) females. D) winter eggs. E) haploid larvae. 8. Rotifers derive their name from a characteristic ciliated structure called the __________ located on the head. A) mastax B) co ...
... 7. The haploid mictic eggs of some rotifers, if not fertilized, develop parthenogenetically into A) dormant eggs. B) males. C) females. D) winter eggs. E) haploid larvae. 8. Rotifers derive their name from a characteristic ciliated structure called the __________ located on the head. A) mastax B) co ...
Virginity: Notes for Teachers and Parents
... adults to meet and to fight it out: to say clearly and unequivocally what the standard will be within the schools for acceptable sexual behaviors and to agree what is prudent counseling for individual teachers to give to students who seek advice on the issues of sexuality. For us to reverse the tren ...
... adults to meet and to fight it out: to say clearly and unequivocally what the standard will be within the schools for acceptable sexual behaviors and to agree what is prudent counseling for individual teachers to give to students who seek advice on the issues of sexuality. For us to reverse the tren ...
Available
... nematocysts. Dactylozooid is defensive in function. Gonozooid : They produce medusae which take up sexual reproduction. Q.3. Metamorphosis: It is a biological process by which an animal physically develops after birth or hatching, involving a conspicuous and relatively abrupt change in the animal's ...
... nematocysts. Dactylozooid is defensive in function. Gonozooid : They produce medusae which take up sexual reproduction. Q.3. Metamorphosis: It is a biological process by which an animal physically develops after birth or hatching, involving a conspicuous and relatively abrupt change in the animal's ...
Mollusks, Echinoderms and Arthropods Powerpoint
... have been something along the lines of sea urchin - an orgasnism a bit larger than a golf ball with spines extending radially. Interesting little creatures, they aren't especially intelligent. In fact, they don't do much of anything. ...
... have been something along the lines of sea urchin - an orgasnism a bit larger than a golf ball with spines extending radially. Interesting little creatures, they aren't especially intelligent. In fact, they don't do much of anything. ...
Beach_Channel_Review_Notes
... Plasmolysis, a special case of diffusion that occurs when a living thing that does not normally live in salt water, is exposed to salt or salt water. Since there is a greater concentration of water inside the cell than outside the cell, water moves out of the cell causing it to shrink and die. (Note ...
... Plasmolysis, a special case of diffusion that occurs when a living thing that does not normally live in salt water, is exposed to salt or salt water. Since there is a greater concentration of water inside the cell than outside the cell, water moves out of the cell causing it to shrink and die. (Note ...
Family Structure, Ethnicity, and the Transition to
... Funded by the Gates Foundation, the Rockefeller Foundation, and Eunice Kennedy Shriver National Institute of Child Health and Human Development, the Ghanaian Survey was part of the National Survey of Adolescents undertaken in four subSaharan African countries to provide detailed information on adole ...
... Funded by the Gates Foundation, the Rockefeller Foundation, and Eunice Kennedy Shriver National Institute of Child Health and Human Development, the Ghanaian Survey was part of the National Survey of Adolescents undertaken in four subSaharan African countries to provide detailed information on adole ...
Models of sexual and asexual coexistence in aphids based on
... Biological data on the genetic determination oj’ lijk-cycle in rrphids The genetic basis of the different types of life-cycle has been extensively studied in two aphid species, A4yzus persiue (Blackman, 1972) and Rhopalosiphum padi (Simon, 1991; Simon et al., 1994). A single locus appears to determi ...
... Biological data on the genetic determination oj’ lijk-cycle in rrphids The genetic basis of the different types of life-cycle has been extensively studied in two aphid species, A4yzus persiue (Blackman, 1972) and Rhopalosiphum padi (Simon, 1991; Simon et al., 1994). A single locus appears to determi ...
Invertebrates
... pouch and abandon them, and others will stay with them until the babies hatch. ...
... pouch and abandon them, and others will stay with them until the babies hatch. ...
paper - Oxford Academic - Oxford University Press
... simulation model by Hamilton (Hamilton WD. 1980. Sex versus non-sex versus parasite. Oikos. 35:282–290.) suggested that parasites could be an important force in selecting against asexual clones, leading to the persistence of sex. This result was consistent with a number of independent verbal models ...
... simulation model by Hamilton (Hamilton WD. 1980. Sex versus non-sex versus parasite. Oikos. 35:282–290.) suggested that parasites could be an important force in selecting against asexual clones, leading to the persistence of sex. This result was consistent with a number of independent verbal models ...
Answer Key - Earl Haig Secondary School
... balance between its diverse living parts and its nonliving, physical environment. This state of balance is called equilibrium. An ecosystem that is in equilibrium tends to have a high degree of biodiversity. Such an ecosystem tends to be a sustainable ecosystem. 12. Five times in the past there were ...
... balance between its diverse living parts and its nonliving, physical environment. This state of balance is called equilibrium. An ecosystem that is in equilibrium tends to have a high degree of biodiversity. Such an ecosystem tends to be a sustainable ecosystem. 12. Five times in the past there were ...
The Dao of Sex: Zamperini Paper One Due: 3/14/2012 Pretty Boys
... While The Carnal Prayer Mat is laced with Confucian, Daoist, and Buddhist doctrine, this paper aims to understand Buddhist concepts of destiny, karma, and enlightenment through an analysis of representations of masculine ideal beauty in late Imperial China. Vesperus’ and Siddhartha’s parallel life ...
... While The Carnal Prayer Mat is laced with Confucian, Daoist, and Buddhist doctrine, this paper aims to understand Buddhist concepts of destiny, karma, and enlightenment through an analysis of representations of masculine ideal beauty in late Imperial China. Vesperus’ and Siddhartha’s parallel life ...
4. BACTERIA, FUNGI AND PLANTAE Unit
... opportunity to see them live then observe carefully. If you see plant specimens during your trip then collect them and prepare them slides and specimens. In the following pages every slide / specimen given in the syllabus have been described and some additional easily available examples have been gi ...
... opportunity to see them live then observe carefully. If you see plant specimens during your trip then collect them and prepare them slides and specimens. In the following pages every slide / specimen given in the syllabus have been described and some additional easily available examples have been gi ...
Chapter 5 Loving Ourselves and Others
... Non-Hispanic black (28%) and Hispanic men (18%) were more likely to have had multiple sexual partners than were non-Hispanic white men (13%) and men from other racial/ethnic groups (9%) Asians report fewer sexual experiences and later first sexual experiences than whites or Hispanics Research on mar ...
... Non-Hispanic black (28%) and Hispanic men (18%) were more likely to have had multiple sexual partners than were non-Hispanic white men (13%) and men from other racial/ethnic groups (9%) Asians report fewer sexual experiences and later first sexual experiences than whites or Hispanics Research on mar ...
Diagnosis and Management of Sexual Problems
... D. Penetrative intercourse throughout the decades helps maintain intimacy in the relationship, emotional well-being and supports the tissue in the pelvis including the urinary tract and pelvic floor ...
... D. Penetrative intercourse throughout the decades helps maintain intimacy in the relationship, emotional well-being and supports the tissue in the pelvis including the urinary tract and pelvic floor ...
Document
... Ovulation – Greatest output of female sex hormone when egg is released from the ovaries ...
... Ovulation – Greatest output of female sex hormone when egg is released from the ovaries ...
By the end of Key Stage 1
... that their actions have consequences and be able to anticipate the results of them ...
... that their actions have consequences and be able to anticipate the results of them ...
Vertebrate Characteristics
... Fish, amphibians and reptiles are ectothermic. The have an internal body temperature that varies with external (environmental conditions) due to a slow metabolism. ...
... Fish, amphibians and reptiles are ectothermic. The have an internal body temperature that varies with external (environmental conditions) due to a slow metabolism. ...
Field conditioning of sexual arousal in humans
... parameters and/or of the laboratory environment may hinder the learning and/or expression of sexual conditioning. The present study used a field conditioning procedure in which precise control over conditioning procedures was exchanged for more naturalistic conditioning parameters. Specifically, the ...
... parameters and/or of the laboratory environment may hinder the learning and/or expression of sexual conditioning. The present study used a field conditioning procedure in which precise control over conditioning procedures was exchanged for more naturalistic conditioning parameters. Specifically, the ...
Characteristics of Living Things
... All living things take in and use energy – A plant uses sunlight and carbon dioxide to make sugars – A bear hunts and eats a fish in order to survive – You yawn to take in more oxygen when you are tired ...
... All living things take in and use energy – A plant uses sunlight and carbon dioxide to make sugars – A bear hunts and eats a fish in order to survive – You yawn to take in more oxygen when you are tired ...
Sexual reproduction
Sexual reproduction is a form of reproduction where two morphologically distinct types of specialized reproductive cells called gametes fuse together, involving a female's large ovum (or egg) and a male's smaller sperm. Each gamete contains half the number of chromosomes of normal cells. They are created by a specialized type of cell division, which only occurs in eukaryotic cells, known as meiosis. The two gametes fuse during fertilization to produce DNA replication and the creation of a single-celled zygote which includes genetic material from both gametes. In a process called genetic recombination, genetic material (DNA) joins up so that homologous chromosome sequences are aligned with each other, and this is followed by exchange of genetic information. Two rounds of cell division then produce four daughter cells with half the number of chromosomes from each original parent cell, and the same number of chromosomes as both parents, though self-fertilization can occur. For instance, in human reproduction each human cell contains 46 chromosomes, 23 pairs, except gamete cells, which only contain 23 chromosomes, so the child will have 23 chromosomes from each parent genetically recombined into 23 pairs. Cell division initiates the development of a new individual organism in multicellular organisms, including animals and plants, for the vast majority of whom this is the primary method of reproduction. A species is defined as a taxonomic rank. A species is often defined as the largest group of organisms where two hybrids are capable of reproducing fertile offspring, typically using sexual reproduction, although the species problem encompasses a series of difficult related questions that often come up when biologists define the word species. The evolution of sexual reproduction is a major puzzle because asexual reproduction should be able to outcompete it as every young organism created can bear its own young. This implies that an asexual population has an intrinsic capacity to grow more rapidly with each generation. This 50% cost is a fitness disadvantage of sexual reproduction. The two-fold cost of sex includes this cost and the fact that any organism can only pass on 50% of its own genes to its offspring. One definite advantage of sexual reproduction is that it prevents the accumulation of genetic mutations.Sexual selection is a mode of natural selection in which some individuals out-reproduce others of a population because they are better at securing mates for sexual reproduction. It has been described as ""a powerful evolutionary force that does not exist in asexual populations""Prokaryotes reproduce through asexual reproduction but may display processes similar to sexual reproduction (mechanisms for lateral gene transfer such as bacterial conjugation, transformation and transduction), but they do not lead to reproduction. In prokaryotes, the initial cell has additional or transformed genetic material.