Plant reproduction

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  • (BQ) Ebook Life science: How Plants Grow and Change provides about what do plants need to live? What are some ways that seeds are moved? What is a spore? Some plants have fi brous roots, while others have taproots; describe how these roots are different, and how they help the plant get what it needs.

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  • Chapter 38 - Plant reproduction and biotechnology. After studying this chapter you will be able to: Describe how the plant life cycle is modified in angiosperms; identify and describe the function of a sepal, petal, stamen (filament and anther), carpel (style, ovary, ovule, and stigma), seed coat, hypocotyl, radicle, epicotyl, endosperm, cotyledon.

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  • A plant nutrient is a chemical element that is essential for plant growth and reproduction. Essential element is a term often used to identify a plant nutrient. The term nutrient implies essentiality, so it is redundant to call these elements essential nutrients. Commonly, for an element to be a nutrient, it must fit certain criteria. The principal criterion is that the element must be required for a plant to complete its life cycle. The second criterion is that no other element substitutes fully for the element being considered as a nutrient.

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  • The American Society for Reproductive Medicine (ASRM) is the specialty society for physicians that focus on infertility. The organization has a Practice Committee that issues regular reports, including guidelines on minimal standards for providing ART, informed consent, and on the number of embryos to be transferred in IVF procedures. The guidelines are distributed to all members of ASRM, are published in the Society's journal, Fertility and Sterility, and are available to the public on ASRM's website (www.asrm.org).

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  • Adolescents, currently about 20 percent of the world’s population, have special reproductive health concerns and face risks related to early sexual experience, marriage and fertility. A rise in the age of marriage globally has contributed to declines in adolescent fertility. However, up to 50 percent of women in some countries still marry or enter a union by age 18, with this figure rising to 70 per- cent by age 20. The proportion of young women married or in union by age 20 is closely linked to adolescent fertility and exposure to reproductive health risks....

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  • There is a theoretical concern that women with a short menstrual cycle may ovulate very early in their cycle, putting them at risk of pregnancy if starting contraception as late as Day 5 or Day 7 (LNG-IUS). There is no strong evidence to support or refute the risk but some sources of patient information (e.g. FPA) advise additional contraception for women in this situation if they have a cycle shorter than 23 days. Faculty guidance on postnatal sexual and reproductive health includes recommendations on starting contraceptive methods after childbirth.

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  • Although not specifically referred to as quick starting, previous Faculty guidance has advised that contraceptive methods can be started at any point in the menstrual cycle if a practitioner is reasonably certain that the woman is not currently pregnant (Box 1)8 or at risk of pregnancy. As sperm may be viable in the female reproductive tract for up to 7 days, health professionals should consider if a woman is at risk of becoming pregnant as a result of unprotected sexual intercourse (UPSI) within the last 7 days.

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  • An obstetrician/gynecologist possesses specialized knowledge, skills, and professional capability in the medical and surgical care of the female reproductive system and associated disorders. To become certified by ABOG requires four years of training, plus two years in clinical practice and passage of both written and oral examinations before certification is complete. Specialists in reproductive medicine usually undergo training in obstetrics and gynecology, followed by training in reproductive endocrinology and infertility, or in urology followed by training in andrology.

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  • (BQ) Ebook Life science: Reproduction helps you know what is asexual reproduction, and what are three forms of asexual reproduction? How can a guinea pig with smooth fur and a pair of smooth coat genes give birth to a baby with a rough coat? What happens during selective breeding?.

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  • (BQ) Ebook Life science: Reproduction of Species provides about how are traits passed on from parents to offspring? How does DNA make a copy of itself? Some animals reproduce by sexual reproduction. What is the difference between internal and external fertilization? Give examples.

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  • Amongst the arguments raised against cloning has been concern that reproductive cloning would lessen the respect for individuals because of the feeling that they could easily be replaced. 23 Every form of reproductive technology raises some question of human values, dignity, worth and juridical rights, some linked to the notion that the person should not be used as a mere mechanical instrument, and that every human individual is a non-repeatable being.

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  • Human cloning has been one of the most emotive and divisive issues to face UN negotiators and the international community in recent years. This report examines how, that despite a widespread consensus amongst nations that it is desirable to ban reproductive cloning, efforts to negotiate an international convention ground to a halt due to fundamental divisions regarding so-called research or therapeutic cloning. Firm positions on both sides of the debate led to the compromise position of a non-binding UN Declaration on Cloning, (A/RES/59/280).

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  • One way scientists find out about the world is by asking questions. Science is an organized way of studying things and finding answers to questions. There are many types of science. The names of the sciences describe what is being studied. For example, a life scientist might study the millions of different animals, plants, and other living things on Earth. Life scientists who study plants are botanists. Those who study animals are zoologists.

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  • Conference on Population and Development (ICPD) and the MDGs. Section 2 provides an overview of the state of SRH over time and across regions, high- lighting areas and groups – both within and between countries – that have had particularly adverse SRH outcomes. It also dissects why attention to access to SRH services is ‘falling short’. Section 3 shows how universal access to sexual and reproductive health and rights affects each of the MDGs.

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  • DNA methylation affects important developmental processes in both plants and animals. The process of methylation of cytosines at C-5 is catalysed by DNA methyltransferases (MTases), which are highly conserved, both struc-turally and functionally, in eukaryotes. In this study, we identified and characterized cytosine DNA MTase genes that are activated with the onset of reproductive development in rice.

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  • Chapter 38 and 39 provides knowledge of angiosperm reproduction - Plant responses to internal and external signals. In this chapter, the following content will be discussed: Types of fruit, plant peproduction, experiments with light and the coleoptile, ethylene gas: fruit ripening, plant movement, plant responses to light, plant responses to stress.

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  • Risk assessment is an inexact science. Successful risk assessment practitioners rely heavily on extensive and well-documented databases.

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  • This book aims to strengthen the knowledge base dealing with Air Pollution. The book consists of 21 chapters dealing with Air Pollution and its effects in the fields of Health, Environment, Economy and Agricultural Sources. It is divided into four sections. The first one deals with effect of air pollution on health and human body organs. The second section includes the Impact of air pollution on plants and agricultural sources and methods of resistance. The third section includes environmental changes, geographic and climatic conditions due to air pollution....

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  • Contraceptive use accounts for a substantial portion of the variation in observed fertility rates (others include age of marriage, abortion rates, post- partum amenorrhea and abstinence, and occurrence of marital separations). Although there have been dramatic increases in the use of family planning services, unmet need for family planning remains very high in low-prevalence regions.

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  • A plant nutrient is a chemical element that is essential for plant growth and reproduction. Essential element is a term often used to identify a plant nutrient. The term nutrient implies essentiality, so it is redundant to call these elements essential nutrients. Commonly, for an element to be a nutrient, it must fit certain criteria. The principal criterion is that the element must be required for a plant to complete its life cycle. The second criterion is that no other element substitutes fully for the element being considered as a nutrient.

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