Stem cells -are biological cells found in all multi cellularorganisms‚ that can divide (throughmitosis) and differentiate into diverse specialized cell types and can self-renew to produce more stem cells. In mammals‚ there are two broad types of stem cells: embryonic stem cells‚ which are isolated from the inner cell mass of blastocysts‚ and adult stem cells‚ which are found in various tissues. In adult organisms‚ stem cells and progenitor cells act as a repair system for the body‚ replenishing
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roles of mitotic cell division‚ meiosis‚ and fertilization in the human life cycle. Mitosis allows for growth and repair from the fertilized egg to the adult. In reproductively mature individuals‚ meiosis creates gametes with half the genetic material. The male gamete then fertilizes the female gamete during sexual reproduction‚ forming a zygote with a full set of genetic material. 2. Why are both cell division and apoptosis necessary for the development of an organism? Cell division is needed
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TITLE: Why Banning Cell Phones while Driving Should be Mandatory Nationwide A. To persuade people not to use their phones while driving B. That we should ban phone usage while driving and make it Nationwide C. Cell phones are very common now a day. Everyone have one from young to old. They can be very useful until we get behind the wheel and try to use it the same time you are diving. So banning cell phone usage a nationwide thing should be a good thing. I. The numbers are steady rising of
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neurotransmitter. In both male and female it is responsible for our physical movement‚ sexual desire‚ motivation .the function is similar in both male and female but abnormal levels of dopamine have a greater effect in males than in females. Estrogen-this hormone is very important in females and is responsible for two cycles in the female body menstrual cycle and estrous cycle. This hormone is considered to be the primary female sex hormone and induces several changes in the female body. In males this hormone
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SPECIALIZED CELL ANIMAL Sperm cells PLANT Xylem cells are specialised to find a female cell (egg cells) and join with it. They have tails‚ that makes them move in water to find and fertilize the female cell. They can move because they have many mitochondria located between the tail and the head‚ which gives them energy. In the head‚ there is a vacuole filled with acrosome‚ which is a specialized Lysosome that releases enzymes in order for the Sperm Cell to break into the Egg Cell‚ through the
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Written Assignment An appraisal of the novel “The Old Gringo” Written by Carlos Fuentes The phenomenal history our world has encountered in the past decades has brought such diversity in not only Americans but all over the world. The separation and isolation brought upon by the arrogance of the nation into culture has become such a tragic fate in years as early as the 1700’s to the present. In the novel “The Old Gringo” Carlos Fuentes develops a very dynamic controversial
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Old Ironsides The poem “Old Ironsides” by Oliver Wendell Holmes was written to remember the US Naval ship the USS Constitution‚ nicknamed “Old Ironsides.” It also had another purpose of saving and preserving the battleship. It has a structure in which the first stanza is referencing the past‚ the second stanza the present‚ and the third stanza the future. This structure helps the reader to understand what is going on in the poem and grasp the tone and theme by allowing the reader to follow the
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The definition of family has changed drastically over the years. According to dictionary.com‚ a family is a group consisting of parents and children living together in a household. In the past few years‚ this traditional definition has changed. To be considered a family people do not have to be living in the same household or related by blood. There are many different factors that play into making people a family. A family does not have to be two parents with kids. There are lots of families whose
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Introduction The trend of African American males between the ages of 25 and 29 has seen a dramatic increase of incarceration. Attention has been focusing on areas of housing‚ education‚ and healthcare but the most prominent problem for African American males is the increase in the incarceration rate. African American males between the ages of 25 and 29 incarceration rate has been thought‚ by many‚ to be caused by economic factors such as under employment or unemployment‚ poor housing‚ lack of
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Males VS Females As described in Weiten‚ Dunn & Hammer‚ the Characteristics of traditional masculine and feminine body language differ in many areas. Many people may look at the behavior of aggression as a traditional body language as masculine for a male. Man people may look at the traditional body language of a female as being nurturing and loving for the feminine role. It’s very obvious that men and women differ in physical appearance as well as body parts but there are still many differences
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