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THE ORIGiN OF SEXUALITY AND SEXUAL
... An indirect indication of sexual activity among the population was that children kept being born at a rapid rate. One hundred years ago, Finnish families had an average of five children. As family planning gained ground, already in the 1920s the number of children declined to an average of three per ...
... An indirect indication of sexual activity among the population was that children kept being born at a rapid rate. One hundred years ago, Finnish families had an average of five children. As family planning gained ground, already in the 1920s the number of children declined to an average of three per ...
AP Biology
... • Readings from What Is Life by Lynn Margulis and Dorian Sagan, Discover & Scientific American Evolution of the Eukaryotic Cell Essential Questions • What are the characteristics, of bacteria and how do they reproduce sexually and asexually • What was the great divide and how were domains determined ...
... • Readings from What Is Life by Lynn Margulis and Dorian Sagan, Discover & Scientific American Evolution of the Eukaryotic Cell Essential Questions • What are the characteristics, of bacteria and how do they reproduce sexually and asexually • What was the great divide and how were domains determined ...
Crossing the Line: Sexual Harassment at School Executive
... Girls were more likely than boys to say that they had been negatively affected by sexual harassment—a finding that confirms previous research by AAUW (2001) and others. Not only were girls more likely than boys to say sexual harassment caused them to have trouble sleeping (22 percent of girls versus ...
... Girls were more likely than boys to say that they had been negatively affected by sexual harassment—a finding that confirms previous research by AAUW (2001) and others. Not only were girls more likely than boys to say sexual harassment caused them to have trouble sleeping (22 percent of girls versus ...
THE EVOLUTION OF MALE TRAITS IN SOCIAL INSECTS Jacobus J
... of males. In the eusocial Hymenoptera, males are short-lived and do not normally engage in social activities. They die after one or a few matings, realized during a brief mating period, and persist as long-lived sperm stored by the queen(s) with whom they mated (65, 66, 84, 136). They are haploid, p ...
... of males. In the eusocial Hymenoptera, males are short-lived and do not normally engage in social activities. They die after one or a few matings, realized during a brief mating period, and persist as long-lived sperm stored by the queen(s) with whom they mated (65, 66, 84, 136). They are haploid, p ...
Second Semester Exam Review Topics – Genetics/Inheritance
... Survival of the Fittest is based on the ability to survive and have Offspring. Offspring then pass on the Genes that provide for the successful Adaptations of Evolution. ...
... Survival of the Fittest is based on the ability to survive and have Offspring. Offspring then pass on the Genes that provide for the successful Adaptations of Evolution. ...
Therapist-Patient Sex as Sex Abuse: Six Scientific, Professional, and
... Pellegrino argued that it is various aspects of a commitment to forgo certain self-interests in order to protect or serve the welfare of patients "that distinguish medicine from business and most other careers or forms of livelihood" (p. 1939). Medicine's commitment to such a professional ethic may ...
... Pellegrino argued that it is various aspects of a commitment to forgo certain self-interests in order to protect or serve the welfare of patients "that distinguish medicine from business and most other careers or forms of livelihood" (p. 1939). Medicine's commitment to such a professional ethic may ...
Antidepressant-Induced Sexual Side Efiects: Incidence
... tients, 23 patients reported that their SD improved “to some extent” or “quite a lot” when their fluoxetine dose was decreased by 50%.21 The theory behind this model is the concept of a flat-dose response curve, in that a patient who responds to a certain dose is not likely to respond more to a grea ...
... tients, 23 patients reported that their SD improved “to some extent” or “quite a lot” when their fluoxetine dose was decreased by 50%.21 The theory behind this model is the concept of a flat-dose response curve, in that a patient who responds to a certain dose is not likely to respond more to a grea ...
Frog Dissection
... 11. Cut the esophagus as close to the mouth as possible. 12. The stomach consists of a large anterior cardiac portion and small posterior pyloric portion which ends at the pyloric sphincter. This circular muscle opens and closes the bottom of the stomach. The first portion of the small intestine, th ...
... 11. Cut the esophagus as close to the mouth as possible. 12. The stomach consists of a large anterior cardiac portion and small posterior pyloric portion which ends at the pyloric sphincter. This circular muscle opens and closes the bottom of the stomach. The first portion of the small intestine, th ...
скачати - ua
... Insects are neumerout invertebrate animals that belong in the Phylum Arthropoda and Class Insecta. The class Insecta is divided into 2 subclasses: Apterygota, or wingless insects, and Pterygota, or winged insects. Subclass Pterygota is futher divided on basis of metamorphosis. Insects that have unde ...
... Insects are neumerout invertebrate animals that belong in the Phylum Arthropoda and Class Insecta. The class Insecta is divided into 2 subclasses: Apterygota, or wingless insects, and Pterygota, or winged insects. Subclass Pterygota is futher divided on basis of metamorphosis. Insects that have unde ...
Review Kin Selection versus Sexual Selection: Why the Ends Do
... imply that helpers should raise at least some half siblings. Reproduction in eusocial insects: The production of sexual offspring: virgin queens, which are usually winged and often disperse during mating flights, and males, which almost always disperse on the wing. The production of workers is norma ...
... imply that helpers should raise at least some half siblings. Reproduction in eusocial insects: The production of sexual offspring: virgin queens, which are usually winged and often disperse during mating flights, and males, which almost always disperse on the wing. The production of workers is norma ...
File - Biology @ Aldenham School
... Chapter 10: Plants and Food • Describe the process of photosynthesis and understand its importance in conversion of light energy to chemical energy • State the word equation and the balanced chemical symbol equation for photosynthesis • Describe how carbon dioxide concentration, light intensity and ...
... Chapter 10: Plants and Food • Describe the process of photosynthesis and understand its importance in conversion of light energy to chemical energy • State the word equation and the balanced chemical symbol equation for photosynthesis • Describe how carbon dioxide concentration, light intensity and ...
In the heat of the night, it is difficult to get it right*teenagers` attitudes
... the given subject (Hylander, 1998; Strid & Eriksson, 1999; Wibeck, 2000). For most people their own sexuality, along with their associated attitudes and values concerning sexuality, is a sensitive matter. Focus groups, however, have a tendency to work out well in situations were the participants’ in ...
... the given subject (Hylander, 1998; Strid & Eriksson, 1999; Wibeck, 2000). For most people their own sexuality, along with their associated attitudes and values concerning sexuality, is a sensitive matter. Focus groups, however, have a tendency to work out well in situations were the participants’ in ...
Advanced Psychopathology – PSY 306 Sexual Deviance and
... orgasm and, therefore, the diagnosis should be based on clinical judgement about the woman’s general capacity for orgasm relative to her age, sexual experience and sexual interest etc. Can’t be better accounted for by an Axis 1 condition, or due to the effects of a medical condition or drug use. ...
... orgasm and, therefore, the diagnosis should be based on clinical judgement about the woman’s general capacity for orgasm relative to her age, sexual experience and sexual interest etc. Can’t be better accounted for by an Axis 1 condition, or due to the effects of a medical condition or drug use. ...
mammals in which females are larger than males
... than in males, greater development of weapons in females, female dominance, or matriarchy. The phenomenon may have evolved in a variety of ways, but it is rarely, if ever, the result of sexual selection acting upon the female sex. T h e most common selective pressures favoring large size in female m ...
... than in males, greater development of weapons in females, female dominance, or matriarchy. The phenomenon may have evolved in a variety of ways, but it is rarely, if ever, the result of sexual selection acting upon the female sex. T h e most common selective pressures favoring large size in female m ...
History of Behavioral and Cognitive
... Manejwala, Raisa () "History of Behavioral and Cognitive-Behavorial Treatments for Sexual Offenders," The Histories: Vol. 3: Iss. 1, ...
... Manejwala, Raisa () "History of Behavioral and Cognitive-Behavorial Treatments for Sexual Offenders," The Histories: Vol. 3: Iss. 1, ...
Animals
... contain a radula- a tonguelike organ with rows of teeth sexual reproduction by external fertilization land mollusks tend to be hermaphroditic to increase chances of fertilization; most mollusks are separate sexes simple nervous systems with a brain and associated nerves 3 chambered hearts with an op ...
... contain a radula- a tonguelike organ with rows of teeth sexual reproduction by external fertilization land mollusks tend to be hermaphroditic to increase chances of fertilization; most mollusks are separate sexes simple nervous systems with a brain and associated nerves 3 chambered hearts with an op ...
ScienceWorld 7
... single mushroom can produce up to 2000 million spores! edible part of mushroom ...
... single mushroom can produce up to 2000 million spores! edible part of mushroom ...
ExtenZe Clinical Study
... ExtenZe increases sexual pleasure and improves sexual performance naturally. It works for adult men of all ages. Study subjects experienced dramatic results in their sex and intimate lives. Whether 30 or 60 ExtenZe helped sexual enjoyment and contributed to longer lasting, more frequent, and more st ...
... ExtenZe increases sexual pleasure and improves sexual performance naturally. It works for adult men of all ages. Study subjects experienced dramatic results in their sex and intimate lives. Whether 30 or 60 ExtenZe helped sexual enjoyment and contributed to longer lasting, more frequent, and more st ...
SEXUAL SELECTION AND THE DESCENT OF MAN 1871-1971
... Baton 1941). Females tend to be more brightly colored than males (rare in frogs) and in at least one species, Dendrobates aurata, several females have been seen pursuing, and possibly courting, single males (Dunn 1941). In this species the male carries only one young on his back, until the tadpole i ...
... Baton 1941). Females tend to be more brightly colored than males (rare in frogs) and in at least one species, Dendrobates aurata, several females have been seen pursuing, and possibly courting, single males (Dunn 1941). In this species the male carries only one young on his back, until the tadpole i ...
Parental Investment and Sexual Selection
... Baton 1941). Females tend to be more brightly colored than males (rare in frogs) and in at least one species, Dendrobates aurata, several females have been seen pursuing, and possibly courting, single males (Dunn 1941). In this species the male carries only one young on his back, until the tadpole i ...
... Baton 1941). Females tend to be more brightly colored than males (rare in frogs) and in at least one species, Dendrobates aurata, several females have been seen pursuing, and possibly courting, single males (Dunn 1941). In this species the male carries only one young on his back, until the tadpole i ...
Prokaryotes
... almost all environments. They are found in the ocean, the soil, and the intestines of animals. They are even found in rocks deep below Earth’s surface. Any surface that has not been sterilized is likely to be covered with bacteria. The total number of bacteria in the world is amazing. It’s estimated ...
... almost all environments. They are found in the ocean, the soil, and the intestines of animals. They are even found in rocks deep below Earth’s surface. Any surface that has not been sterilized is likely to be covered with bacteria. The total number of bacteria in the world is amazing. It’s estimated ...
Chapter 8 Prokaryotes
... environment. Can you explain why? Genetic Transfer In asexual reproduction, all the offspring are exactly the same. This is the biggest drawback of this type of reproduction. Why? Lack of genetic variation increases the risk of extinction. Without variety, there may be no organisms that can survive ...
... environment. Can you explain why? Genetic Transfer In asexual reproduction, all the offspring are exactly the same. This is the biggest drawback of this type of reproduction. Why? Lack of genetic variation increases the risk of extinction. Without variety, there may be no organisms that can survive ...
Topic 7
... Gastrulation is a phase early in the embryonic development of most animals, during which the singlelayered blastula is reorganized into a trilaminar ("threelayered") structure known as the gastrula. These three germ layers are known as the ectoderm, mesoderm, and endoderm. Gastrulation is followed ...
... Gastrulation is a phase early in the embryonic development of most animals, during which the singlelayered blastula is reorganized into a trilaminar ("threelayered") structure known as the gastrula. These three germ layers are known as the ectoderm, mesoderm, and endoderm. Gastrulation is followed ...
Biology revision
... Groups of drugs • Drugs can affect nerves impulses, reaction times and behaviour. 1. Stimulants e.g. tea and coffee. They increase the transmission of signals from one nerve cell to the next, which then increases alertness, heart rate and breathing rate. 2. Sedatives e.g. alcohol slow down the nerv ...
... Groups of drugs • Drugs can affect nerves impulses, reaction times and behaviour. 1. Stimulants e.g. tea and coffee. They increase the transmission of signals from one nerve cell to the next, which then increases alertness, heart rate and breathing rate. 2. Sedatives e.g. alcohol slow down the nerv ...
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.