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4,589 Essays on Science. Documents 4,471 - 4,500

  • What Are the Advantages and Disadvantages of Plant Tissue Culture?

    What Are the Advantages and Disadvantages of Plant Tissue Culture?

    Plant tissue culture is a widely used procedure in plant biology in which organism is planted from the explants of the living plants in a nutrient medium under aseptic conditions. There are both advantages and disadvantages of plant tissue culture. Advantages: 1. To produce many copies of the same plants then which may be used to produce plants with better flowers, odors, fruits or any other properties of the plants that are beneficial to the

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    Essay Length: 259 Words / 2 Pages
    Submitted: March 12, 2010 By: Jessica
  • What Are the Chemicals That Trigger Allergies, and How Can Chemists Help Prevent Allegies?

    What Are the Chemicals That Trigger Allergies, and How Can Chemists Help Prevent Allegies?

    Allergies What are the chemicals that trigger allergies, and how can chemists help prevent allegies? Elle Fremerman | General Chemistry 111 | 2/17/18 Allergies are a chronic health condition amongst children, adults and the elderly. Allergies are one of the most common lifelong illnesses that people have to deal with. If a family member has a history of allergies its more than likely that their kids will inherit them. What are the chemicals that trigger

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    Essay Length: 1,118 Words / 5 Pages
    Submitted: April 19, 2018 By: MLanaghan
  • What Are the Different Impacts of Tourism

    What Are the Different Impacts of Tourism

    Justin Alain Uy HSB 12 May 29, 2014 P-TOUR 2 1. What are the different impacts of tourism? The goal of every tourism community is maximize selected positive impacts while to minimize potential negative impacts. The different impacts include economic, environmental, social and cultural, crowding and congestion, services, taxes, community attitude. The following shows the positive and negative effects of each impact. First would be economic as tourism increases employment of the country rises making

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    Essay Length: 769 Words / 4 Pages
    Submitted: August 5, 2014 By: Justin Uy
  • What Are the Ultimate Effects of Taking Ecstasy?

    What Are the Ultimate Effects of Taking Ecstasy?

    Hypothetically the only drug that should be in ecstasy is the compound MDMA. MDMA was first patented by a German chemical company which allegedly would use it as a diet pill. The company did not end up marketing the drug, and it wasn’t until the 1950’s that it was heard about again. That is when the US Army began experimenting with it as a truth serum. And between 1977 and 1985, therapists researched and tested

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    Essay Length: 1,532 Words / 7 Pages
    Submitted: February 6, 2010 By: Monika
  • What Are We Breathing?

    What Are We Breathing?

    Poor air quality is the culprit for the consequences that are being suffered by many human and plant communities. Air pollution, smog, or acid rain; it may be called whatever you like, it is the effects that it is causing that are important. Although many people associate smog with Los Angeles, it is not the only area that has been effected by poor air quality. Many national parks, aquatic systems, and other populated areas

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    Essay Length: 1,981 Words / 8 Pages
    Submitted: November 19, 2009 By: Yan
  • What Are We Really Eating?

    What Are We Really Eating?

    Bradis McGriff ENVS10 Dr. Williams Rough Draft March 16, 2006 What Are We Really Eating? Everything that we eat has some form of an unnatural chemical in the product. As of late I have been considering only eating organic foods because not only is it healthier, but it is safer. In this term paper I am going to examine a few aspects of organic food. First I will examine what is organic food and what

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    Essay Length: 362 Words / 2 Pages
    Submitted: January 16, 2010 By: Tommy
  • What Biology Means to Me

    What Biology Means to Me

    Biology is the study of life. Without biology, we would have no idea about an organism’s makeup, or the most basic unit of life, a cell. It plays a very important role in our lives. It teaches us how our body functions and how we can take care of it. You have a better overall view when you know all areas of academic study. Likewise, you get to know the scientific method. Biology influences me

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    Essay Length: 403 Words / 2 Pages
    Submitted: November 9, 2009 By: Vika
  • What Cause Mutation and What Are Some of the Possible Results of Genetic Mutation?

    What Cause Mutation and What Are Some of the Possible Results of Genetic Mutation?

    What cause mutation and what are some of the possible results of genetic mutation? In biology, term- mutation has been described as changes to the base pair sequence of the genetic material of an organism. Mutations can be caused by: copying errors in the genetic material during cell division, by exposure to ultraviolet or ionizing radiation, chemical mutagens, or viruses, or can occur deliberately under cellular control during processes such as hypermutation. In multicellular organisms,

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    Essay Length: 1,835 Words / 8 Pages
    Submitted: January 30, 2010 By: Fonta
  • What Caused the Hindenburg Explosion

    What Caused the Hindenburg Explosion

    The Hindenburg was a luxury airship, from nazi Germany. This "Titanic of the skies" (no pun intended) was destroyed by a flash fire in 1937 while landing in New Jersey after making its 10th transatlantic crossing. Thirty-five of the 97 people aboard and one ground crew member were killed when the blimp burst into flames and was rapidly consumed by the fire. The Hindenburg was filled with hydrogen gas which is lighter than air.

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    Essay Length: 679 Words / 3 Pages
    Submitted: November 25, 2009 By: Mike
  • What Causes Acid Rain?

    What Causes Acid Rain?

    What Causes Acid Rain? One of the main causes of acid rain is sulfur dioxide. Natural sources, which emit this gas, are Volcanoes, sea spray, rotting vegetation and plankton. However, the burning of fossil fuels, such as Coal and oil, are largely to be blamed for approximately half of the emissions of this gas in the world. When sulfur dioxide reaches the atmosphere, it oxidizes to first form a sulfate ion. It then Becomes

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    Essay Length: 1,696 Words / 7 Pages
    Submitted: April 8, 2010 By: Yan
  • What Conditions to Keep Chips in Overnight

    What Conditions to Keep Chips in Overnight

    Background Information. I think that this practical will be based on osmosis because ,Osmosis is the random movement of water molecules from a high concentration to a low concentration . This will then happen between the chips and the liquid in the McCarthy bottles . This already tells us that the chips will vary in size from the concentration of water . Plan of the Experiment. Method 1 Firstly we shall set up the experiments

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    Essay Length: 2,749 Words / 11 Pages
    Submitted: December 26, 2009 By: Bred
  • What Do the Straws Strings and Rubber Bands Represent on the Real Hand

    What Do the Straws Strings and Rubber Bands Represent on the Real Hand

    Cer 1: What do the straws strings and rubber bands represent on the real hand. The straws and rubber bands represent the tendons and ligaments. The straw-hand design shown in this project mimics the way that tendons bend your fingers even though the muscles that control the action are actually in your forearm. To make your finger bend, a muscle pulls on a long string of collagen called a tendon. The tendon connects the muscle

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    Essay Length: 313 Words / 2 Pages
    Submitted: December 14, 2015 By: sugar1234
  • What Effect Does Alcohol Have on a Person's Health and Life Expectancy?

    What Effect Does Alcohol Have on a Person's Health and Life Expectancy?

    Nicola Cooper Student No; cs329513 What effect does alcohol have on a person’s health and life expectancy? The consumption of alcoholic beverages dates back to approximately 10,000 years ago when ‘viticulture’ (the selective cultivation of grape vines for making wine) is said to have originated in the mountains between the Black and Caspian Seas. (1) It is one of the most commonly used psychoactive drugs in the world. Alcohol interacts with gamma amino bultyric acid

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    Essay Length: 303 Words / 2 Pages
    Submitted: March 25, 2010 By: Max
  • What Effects Does Crowing Havw on Bean Plants

    What Effects Does Crowing Havw on Bean Plants

    What effect does crowding have on bean plants? My prediction was that crowding would have no effect on them. I predicted it this way because plants are made to grow in tough conditions and I dident think crowding would have any effect. Materials needed to experiment. 2 Planting pots Planting soil 4 Bean seeds Water Ruler Support stick Notebook Procedure: Take your planting pot fill with planting soil a little above half way. Take your

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    Essay Length: 505 Words / 3 Pages
    Submitted: December 3, 2009 By: Edward
  • What Encryptions Algorithms Are the Most Commonly Used by the Public to Prevent Pc Hacking?

    What Encryptions Algorithms Are the Most Commonly Used by the Public to Prevent Pc Hacking?

    Vicki Wilhelm 4 December 2, 2015 Tim Wedge DFS 1109 What encryptions algorithms are the most commonly used by the public to prevent PC hacking? While security is an afterthought for many PC users, it’s a major priority for businesses of any size. Encryption is an interesting piece of technology that works by scrambling data so it is unreadable by unintended parties. Once encrypted, the message literally becomes a jumbled mess of random characters. Whether

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    Essay Length: 868 Words / 4 Pages
    Submitted: March 31, 2016 By: Willie07
  • What Ever Happened to the Dinosaurs?

    What Ever Happened to the Dinosaurs?

    Hamilton Sydney Hamilton Professor James CSCI 202-50 9 February 2017 What Ever Happened to the Dinosaurs? Dinosaurs roamed the Earth for 160 million years. Dinosaurs are ginormous and their skeletons can be seen from museums all over the world. Some dinosaurs flew, some ate meat, and some dinosaurs only ate plants. These prehistoric wonders died off about 65.5 million years ago, but nobody is certain how. There is a two-part theory surrounding how dinosaurs went

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    Essay Length: 400 Words / 2 Pages
    Submitted: April 14, 2017 By: Sydney Hamilton
  • What Factors Affect the Resistance of a Wire?

    What Factors Affect the Resistance of a Wire?

    What Factors Affect the Resistance of a Wire? Planning Background Electricity flows around a circuit in a current. A current is the flow of electrons. Currents are measured in amps. Voltage is the force which pushes electricity through a wire. Voltage comes from a cell or a socket. Voltage is measured in volts. Electrical resistance is a measure of the degree to which a body opposes the passage of an electric current. (en.wikipedia.org/wiki/Resistance(electricity). Resistance is

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    Essay Length: 1,358 Words / 6 Pages
    Submitted: November 19, 2009 By: Mike
  • What Fitness Means

    What Fitness Means

    What does fitness mean to me? Well to start off, when I think of fitness, I think of exercise. Getting out there, and doing something that wears you out, but also makes you feel good about yourself. Then I go on to thinking about eating right, or you could say I think about nutrition. But when it comes to fitness and your health, I think a big part of being successful in achieving any goals

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    Essay Length: 815 Words / 4 Pages
    Submitted: December 5, 2009 By: Steve
  • What Is a Mental Map

    What Is a Mental Map

    Taking the word mental and map into context the first thing that comes to mind is that mental means something abstract. When you place map into a location and geographical perspective you come to understand that maybe a mental map is a map that you have a photographic image of in terms of landmarks and visual objects. For instance, I would think that if one were to think of Africa, they may remember just the

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    Essay Length: 537 Words / 3 Pages
    Submitted: April 11, 2010 By: regina
  • What Is a Tarsier?

    What Is a Tarsier?

    Phylum: Chordata Class: Mammalia Order: Primates Family: Tarsiidae Common Name: Philippine Tarsier What is a tarsier? Tarsiers are the smallest species of monkeys, and wholly carnivores. They have enormous eyes, a long tail, pads at the ends of each of their fingers and toes and, have big round ears that help them hunt better. These pads let them climb very well. Their large eyes are excellent at seeing at night. These animals are nocturnal,

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    Essay Length: 936 Words / 4 Pages
    Submitted: January 5, 2010 By: Jack
  • What Is a Thyroid Gland?

    What Is a Thyroid Gland?

    Introduction What is a thyroid gland? How much do people understand about it? The organ is located at the base of the neck, surrounding the trachea. This seemingly insignificant body part plays a vital role in maintaining optimal development and ensuring the balance of an organism's central nervous system. In cases where it malfunctions, endocrine diseases may arise. This is reflected in Erica* who is a sufferer of grave's disease. This essay will first examine

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    Essay Length: 3,093 Words / 13 Pages
    Submitted: April 23, 2010 By: Venidikt
  • What Is Abortion?

    What Is Abortion?

    What is abortion? Abortion is the ending of a pregnancy before birth. Early in a pregnancy, the fertilized egg that grows and develops is called the embryo. After three months of development, it is usually called a fetus. An abortion causes the embryo or fetus to die. Abortion is a very inhumane thing to do I could never think of giving up a baby even when it is not an actual humane, when it is

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    Essay Length: 802 Words / 4 Pages
    Submitted: December 6, 2009 By: Stenly
  • What Is an Iceberg? Why Are They Blue or Green?

    What Is an Iceberg? Why Are They Blue or Green?

    What is an iceberg? Why are they blue or green? An iceberg is a large floating block of freshwater ice that has broken off the edge of a glacier and been carried out to sea; about 90% of its mass lies under the water. The bluish streaks of clear, bubble free ice often seen in icebergs results from the refreezing of melt water which fills crevasses formed in the glacier as it creeps over

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    Essay Length: 885 Words / 4 Pages
    Submitted: January 17, 2010 By: Janna
  • What Is an Infectuos Disease

    What Is an Infectuos Disease

    What is an Infectious Disease? An Infectious Disease is a disease caused by germs, such as bacteria, viruses, fungi or parasites. These diseases are all "caught", hence they are often termed communicable diseases. Examples of specific infections include Strep throat, mononucleosis, cold sores, athlete's foot, appendicitis, boils, vaginal yeast infections, African Sleeping sickness and tuberculosis. HEPATITIS B VACCINATION Safe and effective vaccines are now available for protection against hepatitis B, a serious liver infection that

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    Essay Length: 558 Words / 3 Pages
    Submitted: January 13, 2010 By: Tasha
  • What Is Anthropology?

    What Is Anthropology?

    Anthropology is defined as the study of humankind and their behavior. Anthropologists conduct scientific and humanistic studies of the culture and evolution of humans. Anthropology is traditionally broken down into four sub-fields: Biological anthropology, Archaeology, Linguistic anthropology, and Cultural anthropology. There is also a fifth sub-field, Applied anthropology. Each of these branches has its own skills, theories, and knowledge of studying humanity. Biological anthropology studies the human body. They look at humans as a species,

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    Essay Length: 431 Words / 2 Pages
    Submitted: January 5, 2010 By: Stenly
  • What Is Arthritis?

    What Is Arthritis?

    ARTHRITIS What is arthritis? Arthritis means inflammation of the joints. It causes pain and usually also limits movement of the joints that are affected. There are many kinds of arthritis, but by far the most common type is called osteoarthritis (also called degenerative joint disease). What causes osteoarthritis? Unfortunately the exact cause isn't known. It has been recognized however that osteoarthritis seems to run in families, so if your parents had arthritis there’s a greater

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    Essay Length: 391 Words / 2 Pages
    Submitted: February 28, 2010 By: Mike
  • What Is Ballistic Gelatin and How Is Does It Aid in Criminalistics?

    What Is Ballistic Gelatin and How Is Does It Aid in Criminalistics?

    What is Ballistic Gelatin and how is does it aid in Criminalistics? Ballistic gelatin is a solution of gelatin powder in water. Ballistic gelatin closely simulates the density and viscosity of human and animal muscle tissue, and is used as a standardized medium for testing the terminal performance of firearms ammunition. While ballistic gelatin does not model the structure of the body, including skin and bones, it works fairly well as an approximation of

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    Essay Length: 342 Words / 2 Pages
    Submitted: January 19, 2010 By: Jon
  • What Is Biodiversity?

    What Is Biodiversity?

    Biodiversity is the measure of variety of the Earth's animal, plant and microbial species; of genetic differences within species and of the ecosystems that support those species. The term first came to public attention in 1992 at the Rio Earth Summit at which a convention for the preservation for the maintenance of biodiversity was signed by over 100 world leaders [excluding the USA as they feared it would undermine the patents and licences of US

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    Essay Length: 1,147 Words / 5 Pages
    Submitted: February 27, 2010 By: Mike
  • What Is Breast Cancer?

    What Is Breast Cancer?

    Introduction: What is breast cancer? Breast cancer will strike one in every eight American women. This makes it the most common cancer in woman. Approximately 200,000 women are diagnosed with breast cancer each year. Of that number, 40,000 will die from breast cancer each year. (Journal of Environmental Health 2003) Breast cancer is just one type of cancer. Cancerous cells are cells that grow without the normal system of controls placed upon them. Breast

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    Essay Length: 4,375 Words / 18 Pages
    Submitted: April 8, 2010 By: Anna
  • What Is Cancer

    What Is Cancer

    What is Cancer The article entitled “What Is Cancer?” from the American Cancer Society’s web site discussed how cancer forms and effects people in different ways depending on what type of cancer they have. It also mentioned how cancers are treated and ways to prevent cancer. Cancer forms from the uncontrolled growth of abnormal cells in the body. When we are born we all have normal cells that continually grow until adulthood. We also have

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    Essay Length: 364 Words / 2 Pages
    Submitted: January 13, 2010 By: Tommy
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