Essays Tagged: "Cell division"
Diphtheria (Corynebacterium diphtheriae)
d, club-shaped or V-shapedarrangements in normal growth. They undergo snapping movements just after celldivision which brings them into characteristic arrangements resembling Chinese letters.The genus ... tion of a bacterial exotoxin.In 1888, Roux and Yersin demonstrated the presence of the toxin in the cell-free culturefluid of C. diphtheriae which, when injected into suitable lab animals, caused thes ...
Subjects: Humanities Essays > Health & Medicine > Diseases
Life-span development chap 4 notes
.Prenatal DevelopmentA.Germinal Period - Conception to 2 weeks1. Creation of the zygote2. Continued cell division3. Implantation - attachment of the zygote to the uterine wall (10 days after conceptio ... ation - attachment of the zygote to the uterine wall (10 days after conception)* Blastocyst - inner cells (embryo)* Trophoblast - outer layer (placenta/umbilical cord - life supports systems)B.Embryon ...
Subjects: Social Science Essays > Psychology
The process of mitosis (cell replication)
An essay describing the processes that make up mitosis (cell replication). Very good.The process of Mitosis---------------------------------------Mitosis is ... d.The process of Mitosis---------------------------------------Mitosis is the term used to describe cell division for replication. The product at the end of mitosis is two daughter cells both genetica ... uct at the end of mitosis is two daughter cells both genetically identical to the original (parent) cell. This process (mitosis) is used for growth and repair within an organism (and also for asexual ...
Subjects: Science Essays > Biology
All about cancer.
............1How do you get cancer?................................................................1Cell division figure................................................................................ ... y. Even though there are so many, the have one characteristic in common: the uncontrolled growth of cells.How do you get cancer?Normally, cells duplicate constantly: one cell becomes two, these two be ...
Subjects: Science Essays > Biology > Human Biology
What is cancer and why/how does it kill? How do chemotherapeutic agents work? Why does chemotherapy, itself, cause health problems?
Cancer is a group of diseases characterized by uncontrolled growth and the spread of abnormal cells caused by a mutation or defect in the genetic material of a cell. If one cell becomes cancerou ... etic material of a cell. If one cell becomes cancerous then all cells that arise from that abnormal cell will also be cancerous. These abnormal cells destroy the part of the body in which they origina ...
Subjects: Humanities Essays > Health & Medicine > Diseases
Organism reproduction with an emphasis on meiotic cell disivion
xual reproduction. A sperm and egg individually carry one set of genetic information. Egg and sperm cells are collectively known as gametes. Gametes are formed by a kind of cell division called mitosi ... formed by a kind of cell division called mitosis.The fusion of a sperm from the father and the egg cells from the mother is known as fertilization. The resulting fertilized egg is called a zygote, an ...
Subjects: Science Essays > Biology
Discuss the hormones in plants and their actions. (auxin, gibberellin, cytokinin, abscisic acid, ethylene)
es: Auxin, Gibberellins, cytokinins, abscisic acid, and ethylene.Auxin affects meristematic growth, cell elongation in shoots, cell division, growth of lateral buds, production of xylem, development o ... ees produce more xylem for thickness. Auxin causes plasma membrane to transport four ions out o the cell. Synthetic auxins are used to kill weeds. Agent Orange is used to kill unwanted trees or to con ...
Subjects: Science Essays > Biology > Plant Biology
How is sex determined in Drosophila and Humans?
The protein profile of each cell, in other words the amounts and types of proteins it expresses, determines its role in the deve ... ns it expresses, determines its role in the development of the organism that it forms part of. Each cell is assigned a fate by the information encoded in the DNA of the organism, and these fates vary ... formation encoded in the DNA of the organism, and these fates vary according to the location of the cell in relation to the original zygote cell. Protein signals from this central cell control the cel ...
Subjects: Science Essays > Biology > Human Biology
Regulation, Mitosis, an Meiosis.
Regulation is the life process by which organisms and cells respond to our constantly changing internal and external environment. This is important becaus ... es occur which helps maintain homeostasis within the body.Mitosis and meiosis are both processes of cell division. Mitosis is the process by which the nucleus of a cell divides to create two new nucle ... cleus of a cell divides to create two new nuclei, each containing an identical copy of DNA. Mitotic cell division occurs in all body cells except for sex cells. Meiosis is the process of cell division ...
Subjects: Science Essays > Biology
Biology notes about DNA's roll in a cell and how it is fitted in. Also includes plenty imformation on Chromosomes.
DNA directs a cell's activities and determines a cell's characteristic. This vast amount of vital information enco ... into genes. A gene is a segment of DNA that transmits information from parent to offspring. When a cell prepares to divide, the DNA molecule coils and twists into a dense structure called a chromosom ... ped structure that forms when a single DNA molecule and its associated proteins coil tightly before cell division.Chromosomes become visible through a microscope only after they have condensed prior t ...
Subjects: Science Essays > Biology
Latest Stem Cell research.
STEM CELL RESEARCHResearch on stem cells is advancing knowledge about how an organism develops from a sin ... stem cells is advancing knowledge about how an organism develops from a single cell and how healthy cells replace damaged cells in adult organisms. Stem cells are one of the most fascinating areas of ... ting areas of biology today. But like many expanding fields of scientific inquiry, research on stem cells raises scientific questions as rapidly as it generates new discoveries.The NIH developed this ...
Subjects: Science Essays > Biology > Plant Biology
Test Essay on Cell Division, Anatomy & Physiology Dr. Mann.
The Process of Mitosis is the term used to describe cell division for replication. This process is used for growth and repair within an organism and als ... into these stages the process of mitosis is actually continuous.In Interphase, the first stage, the cell is the original part. All cell organelles are being produced in quantity and the chromosomes (D ... f chromatids and they are linked together by an item called a chromomere.In Prophase changes to the cell become visible. The chromosomes condense, coiling up to about 5% of their original length. The ...
Subjects: Science Essays > Biology
Mitosis explanation, plain and simple....maybe write more about cytokinesis???
MitosisMitosis is the process of a cell dividing. A parent cell divides to create two identical daughter cells, which are exact replica ... ell divides to create two identical daughter cells, which are exact replicas of the original parent cell. DNA is replicated, and each daughter cell receives one copy of the original DNA and the cell g ... nsisting of 4 steps called mitosis.Interphase, which isn't part of mitosis, is the "stage" when the cell is not in the process of dividing, but DNA is being replicated. Interphase itself has its three ...
Subjects: Science Essays > Biology > Human Biology
Stem Cell Research: Moral or Immoral.
Stem Cell Research: Moral or ImmoralBy: Amy RectorEnglish 111First of all to write this paper I feel I ne ... l or ImmoralBy: Amy RectorEnglish 111First of all to write this paper I feel I need to explain stem cell research. Stem cells have two important characteristics that set them apart from other types of ... ortant characteristics that set them apart from other types of cells. First, they are unspecialized cells that renew themselves for long periods of time through cell division. The second is that under ...
Subjects: Science Essays
Mitosis.Major Events Occurring During Mitosis and Cytokinesis.Include different phases of cell duplication.
IntroductionCell division has fascinated cell biologists for more than a hundred years. Among many good reasons ... inesis are beautiful to watch: M phase undoubtedly represents the most dramatic phase of the entire cell cycle, and most cellular structures undergo profound reorganizations. In all eukaryotic organis ... detailed comparison of mitosis in evolutionarily distant organisms, or even the study of different cell types within one and the same organism, reveals many variations on these common themes. This ar ...
Subjects: Science Essays > Biotechnology
Cell Division- Mitosis
Cell Division- MitosisAs a cell grows, more demand is placed on exchange of materials (nutrients int ... of materials (nutrients intake, waste removal intake). Also more demands are placed on its DNAAs a cell grows it's surface area grows slower (Pie R Squared) than its volume (Pie R Cubed). When the ra ... . When the ratio of Surface Area/Volume reaches a specific point chemicals called cyclins begin the cell division process.What are chromosomes?They are a protein structure that contain DNA (genetic in ...
Subjects: Science Essays
Stem Cell Research
s of people before making his decision on one of the most controversial issues in our society, stem cell research. The first step he took was becoming knowledgeable on stem cells. Stem cells are unspe ... em cells. Stem cells are unspecialized cells that renew themselves for long periods of time through cell division. Researchers discovered stem cells in the tissues and organs of adults, human embryos, ...
Subjects: Science Essays
Key Points about the Cell Cycle and Cancer
For 5/6 of the history of life, all life was unicellular, and went through the cell cycle on a regular basis. As soon as enough growth had occurred, ... s enough growth had occurred, the cell would begin the "S" phase, eventually leading to mitosis and cell division.Between 600 and 400 million years ago, some eukaryotes became multicellular (animals, ... 400 million years ago, some eukaryotes became multicellular (animals, plants, fungi). Most of their cells now divide only a limited number of times before pausing in "G1" and specializing. These cells ...
Subjects: Science Essays > Biology
Cancer Cell Metastasis and How Cells Diffuse Into Diverse Parts of the Body
Cancer is coined as the uncontrolled growth of abnormal cells that have mutated from normal tissues. This growth is known to kill when these cells spread th ... kill when these cells spread throughout the body and prevent normal function of vital organs. These cells are able to develop in almost any organ, fluid, or tissue within the body. Each organ within t ... ost any organ, fluid, or tissue within the body. Each organ within the body consists of specialized cells that carry out specific functions, such as transportation of nutrients, oxygen, waste material ...
Subjects: Science Essays > Biology > Human Biology
To investigate the effect of phosphate on cell division in root tips.
Planning ExerciseAimTo investigate the effect of phosphate on cell division in root tips.Background knowledgePhosphate ions (macronutrients) are needed large amou ... nutrients) are needed large amounts by plants. They are required for root growth. For the root tips cells to divide, mitosis has to occur. Phosphate is needed for production of ATP which provides ener ... n of ATP which provides energy for mitosis to occur.DNA replication occurs during interphase of the cell cycle. DNA is made up of nitrogen containing base, pentose sugar and phosphate group. The phosp ...
Subjects: Science Essays > Biology > Plant Biology