ANIMAL KINGDOM 1 EVOLUTIONARY TRENDS and PHYLUM
... it receives nourishment. Shortly after this it constricts or pinches off from the parent and begins its own independent life. The asexual budding process produces new hydras that are genetically identical to the parent hydra. Hydras have the curious ability to regenerate lost or damaged tentacles wh ...
... it receives nourishment. Shortly after this it constricts or pinches off from the parent and begins its own independent life. The asexual budding process produces new hydras that are genetically identical to the parent hydra. Hydras have the curious ability to regenerate lost or damaged tentacles wh ...
Dunn 1..7 - Science Advances
... sexual dichromatism in hue (SD = 3.1; F976,976 = 1.86, P < 0.001). On the other hand, female hue (SD = 2.8) was not more variable than sexual dichromatism in hue (SD = 3.1; F976,976 = 0.86, P = 0.99). Evolutionary transitions to monochromatism To examine the evolutionary changes that led to these po ...
... sexual dichromatism in hue (SD = 3.1; F976,976 = 1.86, P < 0.001). On the other hand, female hue (SD = 2.8) was not more variable than sexual dichromatism in hue (SD = 3.1; F976,976 = 0.86, P = 0.99). Evolutionary transitions to monochromatism To examine the evolutionary changes that led to these po ...
Glossary - Genetics
... Dizygotic twins: Nonidentical twins, arising from two different eggs fertilised by two different sperm; such twins are also referred to as fraternal twins. DNA (deoxyribonucleic acid): The chemical compound that makes up genes within chromosomes and is the basic material of heredity. It is made up o ...
... Dizygotic twins: Nonidentical twins, arising from two different eggs fertilised by two different sperm; such twins are also referred to as fraternal twins. DNA (deoxyribonucleic acid): The chemical compound that makes up genes within chromosomes and is the basic material of heredity. It is made up o ...
mate choice and its evolutionary consequences
... mating. Either way, choice of mate is fundamental since the quality of the mate is likely to affect the fitness of the choosing individual through direct or indirect benefits. Direct benefits are, for example, nuptial gifts that is transferred during the copulation (Wedell and Ritchie 2004), and oth ...
... mating. Either way, choice of mate is fundamental since the quality of the mate is likely to affect the fitness of the choosing individual through direct or indirect benefits. Direct benefits are, for example, nuptial gifts that is transferred during the copulation (Wedell and Ritchie 2004), and oth ...
Title: Too Many Men: The Violence Problem? Authors: Ryan Schacht
... intensity of sexual selection is driven by intrasexual variability in quality [16], paternity certainty [15, 17], and ...
... intensity of sexual selection is driven by intrasexual variability in quality [16], paternity certainty [15, 17], and ...
decision - New Zealand Advertising Standards Authority
... Complainant: A. Machin Advertisement: Domino’s Pizza Complaint: A television advertisement for Domino’s Pizza featured a male and two females eating roast beef pizza. As the blonde female chews the pizza she starts to take on the characteristics of a male. She looks at the brunette female and moves ...
... Complainant: A. Machin Advertisement: Domino’s Pizza Complaint: A television advertisement for Domino’s Pizza featured a male and two females eating roast beef pizza. As the blonde female chews the pizza she starts to take on the characteristics of a male. She looks at the brunette female and moves ...
Effective Erectile Dysfunction (ED) Treatment Enables Men to Enjoy
... enhance basic (as opposed to sexual) intimacy (hugs, kisses, cuddles), as well as for sexual intercourse [25]. ED has an independent negative effect on the sexual satisfaction and sexual drive of women partners [26], whereas effective treatment of ED has been shown to improve sexual function and sat ...
... enhance basic (as opposed to sexual) intimacy (hugs, kisses, cuddles), as well as for sexual intercourse [25]. ED has an independent negative effect on the sexual satisfaction and sexual drive of women partners [26], whereas effective treatment of ED has been shown to improve sexual function and sat ...
Sexuality Following Spinal Cord Injury
... “cock rings.” The two biggest concerns are skin integrity and adequate blood flow. The use of plenty of water-based lubricant such as KY jelly or one of the many lubricants made specifically for sexual activity is necessary to avoid skin breakdown when applying and removing the device. A proper fit ...
... “cock rings.” The two biggest concerns are skin integrity and adequate blood flow. The use of plenty of water-based lubricant such as KY jelly or one of the many lubricants made specifically for sexual activity is necessary to avoid skin breakdown when applying and removing the device. A proper fit ...
Sex Differences and Defects Menstruation Circumcision
... • Physical causes include organic factors such as disease and drugs. • Diseases associated with the heart and circulatory system are likely to be associated with the condition. Hormonal Causes: • Hypogonadism - an underfunctioning of the testes, so that testosterone levels are very low. • Hyperprola ...
... • Physical causes include organic factors such as disease and drugs. • Diseases associated with the heart and circulatory system are likely to be associated with the condition. Hormonal Causes: • Hypogonadism - an underfunctioning of the testes, so that testosterone levels are very low. • Hyperprola ...
Becoming A Woman: Simone de Beauvoir on
... What about as a woman gets older? The aging woman is described by de Beauvoir as “intent on struggling against a misfortune that was mysteriously disfiguring and deforming her ” (p595). This is a very negative description of the aging process. It evokes the tone of a cosmetics advert which pressures ...
... What about as a woman gets older? The aging woman is described by de Beauvoir as “intent on struggling against a misfortune that was mysteriously disfiguring and deforming her ” (p595). This is a very negative description of the aging process. It evokes the tone of a cosmetics advert which pressures ...
StandardB1: INQUIRY, Reflection, And social implications
... B1.2 Scientific Reflection and Social Implications The integrity of the scientific process depends on scientists and citizens understanding and respecting the “nature of science.” Openness to new ideas, skepticism, and honesty are attributes required for good scientific practice. Scientists must use ...
... B1.2 Scientific Reflection and Social Implications The integrity of the scientific process depends on scientists and citizens understanding and respecting the “nature of science.” Openness to new ideas, skepticism, and honesty are attributes required for good scientific practice. Scientists must use ...
File
... Reptiles are not dependent on wet ecosystems because they have evolved body scales that prevent dehydration. They use lungs for gas exchange. Fertilization is internal, and while most lay eggs, some reptiles in colder environments give birth to live offspring. ...
... Reptiles are not dependent on wet ecosystems because they have evolved body scales that prevent dehydration. They use lungs for gas exchange. Fertilization is internal, and while most lay eggs, some reptiles in colder environments give birth to live offspring. ...
IS IT SEXUAL MISCONDUCT?: Educational Scenarios
... couple of days. Then, Riley starts to get missed calls from private numbers at all hours of the day and night. Riley is starting to get scared. A mutual friend tells Riley that Mischa told them they are the one who created the fake Facebook profile. Is Mischa’s behavior a violation of the Sexual Mi ...
... couple of days. Then, Riley starts to get missed calls from private numbers at all hours of the day and night. Riley is starting to get scared. A mutual friend tells Riley that Mischa told them they are the one who created the fake Facebook profile. Is Mischa’s behavior a violation of the Sexual Mi ...
parent communication relationship and exposure fornografi
... fornografi, parent communication and knowledge of adolescents with adolescent sexual behavior in high school at Al-Abdi Bahlias Emplasment, Pt. Pp. Lonsum, population in this study is the student4grade XI in SMA AL-ABDI as many as 44 people. The whole population sampled. Analysis of the data used is ...
... fornografi, parent communication and knowledge of adolescents with adolescent sexual behavior in high school at Al-Abdi Bahlias Emplasment, Pt. Pp. Lonsum, population in this study is the student4grade XI in SMA AL-ABDI as many as 44 people. The whole population sampled. Analysis of the data used is ...
Slide 1 - AccessMedicine
... gonad, they differentiate into oogonia. Mitotic division of oogonia increases the population. Many oogonia further differentiate into primary oocytes, which begin meiosis. However, the process arrests during prophase. A primary oocyte with its surrounding epithelial cells is called a primordial foll ...
... gonad, they differentiate into oogonia. Mitotic division of oogonia increases the population. Many oogonia further differentiate into primary oocytes, which begin meiosis. However, the process arrests during prophase. A primary oocyte with its surrounding epithelial cells is called a primordial foll ...
Phylum Platyhelminthes
... Flatworms have two eyespots on the top of their head that detect light. Most flatworms will move AWAY from light. They also have auricles on the side of their head. The auricles look like what we would call ears, but actually function more like two tiny noses, and are used to search out food. ...
... Flatworms have two eyespots on the top of their head that detect light. Most flatworms will move AWAY from light. They also have auricles on the side of their head. The auricles look like what we would call ears, but actually function more like two tiny noses, and are used to search out food. ...
Ch 28 Arthropods
... E. Horseshoe Crabs: Living Fossils – Members of the class _________________________. F. Insects – by far, the largest class of arthropods 1. Insect reproduction – insects mate about once during their lifetime. The eggs are fertilized internally. Most insects lay a large number of eggs. _____________ ...
... E. Horseshoe Crabs: Living Fossils – Members of the class _________________________. F. Insects – by far, the largest class of arthropods 1. Insect reproduction – insects mate about once during their lifetime. The eggs are fertilized internally. Most insects lay a large number of eggs. _____________ ...
Name
... long as the female is alive. Although a female will mate only once, she may produce many fertilized egg masses during her lifetime from this single mating. Fertilization occurs each time a new egg mass is produced by the ovaries until the sperm reserves are depleted. Studies in Florida found that so ...
... long as the female is alive. Although a female will mate only once, she may produce many fertilized egg masses during her lifetime from this single mating. Fertilization occurs each time a new egg mass is produced by the ovaries until the sperm reserves are depleted. Studies in Florida found that so ...
Biology 11 - Earthworm Dissection Guide
... years before the offspring appear! Eggs will remain in the cocoon almost forever. In fact, worms cannot release themselves from the cocoon. They must be set free from the outside. They will only hatch if and when the conditions are right for their survival. If there are not enough soil bacteria (the ...
... years before the offspring appear! Eggs will remain in the cocoon almost forever. In fact, worms cannot release themselves from the cocoon. They must be set free from the outside. They will only hatch if and when the conditions are right for their survival. If there are not enough soil bacteria (the ...
The Phylum Annelida: A Short Introduction
... than by budding. [7][16] However, leeches have never been seen reproducing asexually. [7][17] ...
... than by budding. [7][16] However, leeches have never been seen reproducing asexually. [7][17] ...
filled-in vers.
... As fertilized egg cells divide this is called cleavage. What happens to cell size initially? ...
... As fertilized egg cells divide this is called cleavage. What happens to cell size initially? ...
Sexually harmful behaviour in young children and the link
... environment where their physical or verbal expressions of distress or arousal were not understood, but rather met with angry or fearful responses from their caregivers. Wilful or unconscious ignoring, misunderstanding or repressing of the children’s needs were also recurring themes. Even development ...
... environment where their physical or verbal expressions of distress or arousal were not understood, but rather met with angry or fearful responses from their caregivers. Wilful or unconscious ignoring, misunderstanding or repressing of the children’s needs were also recurring themes. Even development ...
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.