Lab Report #1 Ahmad Dweik Question/Problem Which phase of cell division / mitosis is seen most often in whitefish blastula? Introduction Cell division is the process of a parent cell dividing into two daughter cells. Mitosis is a type of cell division. In mitosis a parent cells chromosomes are copied and separated into two cells with different nucleuses but same DNA. There are steps or phases that take place that make the cell divide. The first phase is called Interphase. In interphase there
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STANDARD GRADE BIOLOGY CREDIT LEVEL REVISION QUESTIONS INVESTIGATING CELLS 1. In an investigation‚ three 25 g samples of sultanas were put into separate beakers of distilled water‚ as shown below: After 24 hours‚ the sultanas were removed from the water‚ blotted on filter paper and reweighed. The results are shown in the table: |Sample |Mass after 24 hrs (g) |Percentage change in mass | |1
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Cell Size Control David A Guertin‚ Whitehead Institute for Biomedical Research‚ Cambridge‚ Massachusetts‚ USA David M Sabatini‚ Whitehead Institute for Biomedical Research‚ Cambridge‚ Massachusetts‚ USA Growth in biological systems is defined as the accumulation of mass‚ which leads to an increase in size. In this article‚ we discuss how cells‚ organs‚ and organisms normally control growth‚ and how deregulated growth can lead to a variety of pathological conditions. Introductory article Article
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Mitosis is a process of cell duplication‚ or reproduction‚ where one during this process gives growth to two identical daughter cells; however‚ there is no crossing over. Mitosis is asexual and has 1 division of the nucleus in cytokinesis (Simon‚ Reece‚ & Dickey‚ 2010). Meiosis is the splitting up of germ cells‚ with each possessing half the number of & Dickey‚ 2010). Meiosis is sexual and has 2 nuclear and cytoplasmic divisions. However‚ one must remember they both are preceded by Interphase
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GROUP 6 ANIMAL CELL and It’s Functions ANIMAL CELL: About animal cell usually have an irregular shape. are eukaryote cells‚ or cells with a membrane bound nucleus. DNA is housed within the nucleus. Also contain other membrane bound organelles‚ or tiny cellular structures that carry out specific functions necessary for normal cellular operation. smaller than plant cells. Cell Membrane is the outermost component of a cell. it is composed of 55% proteins‚ 25% phospholipids
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Cell Structure and Function Chapter Outline Cell theory Properties common to all cells Cell size and shape – why are cells so small? Prokaryotic cells Eukaryotic cells Organelles and structure in all eukaryotic cell Organelles in plant cells but not animal Cell junctions History of Cell Theory mid 1600s – Anton van Leeuwenhoek Improved microscope‚ observed many living cells mid 1600s – Robert Hooke Observed many cells including cork cells 1850 – Rudolf Virchow
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the female parent. 2. Highlight the letter of each way to describe a diploid cell. a. 2N b. Contains two sets of homologous chromosomes c. Contains a single set of homologous chromosomes d. A gamete 3. Highlight the letter of the number of chromosomes in a haploid cell where 2n=8 . a. 8 b. 4 c. 2 d. 0 4. Is the following sentence true or false? The diploid cell that enters meiosis becomes 4 haploid cells at the end of meiosis.false 5. How does a tetrad form in prophase I of meiosis
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consumes‚ and which consist always either in the immediate produce of that labour or in what is purchased with that produce from other nations.” (Smith‚WN‚159) For Smith‚ this quote backs up his idea of economic growth and that it stems from the division of labor‚ because in his opinion‚ labor is the true source of wealth. So what the dividing of the labor process does is that it takes a long process‚ and breaks the process down into sub-processes. In other words‚ the project is becoming specialized
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Eukaryotic Cells Worksheet Provide a list describing at least three differences between prokaryotic and eukaryotic cells: 1. While Prokaryotes contain just one copy of each gene‚ eukaryotic cells have two. For such reason‚ prokaryotes are known as haploid and eukaryotic as diploid. 2. While Prokaryotes see some nonessential genes being encoded into extra-chromosomal plasmids‚ such activity is typically absent in Eukaryotic cells. 3. The own way DNA is present in each type of cell has different
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Cells‚ in a lot of ways‚ are like factories. All the parts of a cell work together to accomplish common goals‚ just like parts of a factory. Each part also has a specific function‚ to make getting the job done a lot easier. The floor of a factory is a lot like the cytoplasm in a cell. It kind of keeps everything where it needs to be‚ and helps direct organelles around the cell‚ much like the pathways on the floor around the machines. The cell membrane in a cell is very similar to the outside
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